Glossary

Real-Time Location System terms and definitions — RTLS concepts, BlueGPS product names, and terminology used across manufacturing, logistics, aerospace MRO, pharmaceutical manufacturing, healthcare, and smart buildings.

Real-time location systems combine location technologies, software, maps, operational data, and business rules. The terminology can cover everything from radio signal measurements to manufacturing workflows and hospital operations.

This glossary defines common RTLS terms, BlueGPS product names, and terms used in manufacturing, logistics, aerospace MRO, pharmaceutical manufacturing, healthcare, and smart buildings.

System accuracy, range, update rate, and performance depend on the selected technology, system design, operating environment, and use case.

BlueGPS products and named solutions

BlueGPS: BlueGPS is a software-first real-time location system and location intelligence platform. It combines location data from technologies such as Bluetooth Low Energy, UWB, GPS, GNSS, RFID, barcode, and QR code systems with maps, asset data, operational rules, workflows, analytics, and enterprise integrations. BlueGPS can support industrial operations, aerospace MRO, pharmaceutical manufacturing, healthcare, smart buildings, campuses, logistics, and other environments that require visibility of assets, people, equipment, and processes.
BlueGPS API: The BlueGPS application programming interface allows other systems to send data to BlueGPS, retrieve information, and use BlueGPS functions. Organizations can use the API to connect location intelligence with ERP, MES, CMMS, BMS, mobile, web, analytics, and operational systems.
BlueGPS SDK: The BlueGPS software development kit helps developers add location functions to mobile apps, web applications, terminals, and other digital services. It provides software components, documentation, APIs, and hardware integration support so development teams do not need to build the location layer from the start.
Asset Manager: Asset Manager is the BlueGPS interface for registering, locating, searching, and managing tagged assets. It brings asset identity, metadata, current location, status, movement history, and location events into one system. Asset Manager can connect with systems such as ERP, MES, CMMS, and BMS platforms to maintain a consistent asset record across physical and digital operations.
Asset Manager Mobile App: The Asset Manager Mobile App gives operators and technicians access to asset information from a smartphone or tablet. Users can scan tags, associate tags with assets, search for equipment, update records, confirm tasks, and report issues while working in the operating environment.
Pool Manager: Pool Manager is a BlueGPS function for monitoring groups of assets within defined areas. Users can set minimum quantities, maximum quantities, expected locations, and other rules for each asset pool. The system can generate an event or notification when stock levels, asset distribution, or location conditions move outside the defined limits.
Picking List and Workflow Manager: The BlueGPS Picking List and Workflow Manager coordinates operational tasks such as picking, kitting, loading, assembly, and material movement. It can guide operators through a sequence, confirm task completion, and connect physical activity with ERP, MES, or work-order data.
Workplace Explorer: Workplace Explorer is a BlueGPS framework for managing location information from RTLS platforms and data from third-party systems such as IoT sensors. It can support functions such as indoor positioning, booking, building control, access control, locker management, asset management, and lift integration. Workplace Explorer can operate in cloud or on-premises environments, depending on system and data requirements.
Easy Planner: Easy Planner is a workplace planning function referenced in BlueGPS smart building deployments. It helps employees plan their working week, choose where they will work, and coordinate access to workplace resources.
Room Panels: Room Panels are screens placed outside meeting rooms or shared spaces. They can display current availability, upcoming reservations, check-in information, and booking options at the point of use.
TouchX: TouchX is a BlueGPS smart building experience that lets a user access room or building controls through an NFC interaction. Depending on the connected building systems, users may control services such as lighting, temperature, and blinds.
E-Patient SDK: The E-Patient SDK is a named healthcare integration referenced by BlueGPS. It connects location-enabled hospital services with patient-facing digital applications and supports functions such as navigation and access to hospital information.

A

Accuracy: The degree to which a reported position matches the object’s actual position. RTLS accuracy may be expressed in centimeters, meters, rooms, zones, floors, or defined operational areas.
Access control: A system that decides whether a person, device, or vehicle may enter a building, room, or restricted zone. RTLS can add location, presence, role, and movement context to access-control decisions.
Active pharmaceutical ingredient (API): The substance in a pharmaceutical product that produces its intended medical effect. Pharmaceutical manufacturers may use RTLS to track APIs, containers, materials, and associated handling conditions.
Active RFID: A form of radio frequency identification in which the tag contains a battery and transmits a signal. Active RFID can support longer read ranges and more frequent updates than passive RFID.
Active tag: A battery-powered device that transmits an identification or location signal. Active tags may include buttons, accelerometers, temperature sensors, or other components.
Adaptive precision: A method of changing positioning accuracy, update frequency, or processing behavior according to the use case. A system may use precise positioning in one zone and lower-cost zonal tracking elsewhere.
Anchor: A fixed device installed at a known position that detects signals from tags or exchanges timing data with them. Positioning systems use data from multiple anchors to calculate tag locations.
Angle of arrival (AoA): A positioning method that estimates the direction from which a radio signal arrives. Bluetooth AoA systems commonly use antenna arrays to calculate the signal angle and determine a tag or device position.
Antenna: A component that transmits or receives radio signals. Antenna type, orientation, placement, gain, and surrounding materials can affect RTLS coverage and accuracy.
Application programming interface (API): A defined method that lets software systems exchange data and functions. An RTLS API can provide access to positions, assets, events, maps, zones, users, and historical records.
Asset: A physical item that an organization needs to identify, locate, manage, maintain, or use. Examples include tools, equipment, vehicles, containers, hospital beds, instruments, materials, and components.
Asset identity: The digital record that represents a physical asset. It may include an asset ID, serial number, description, type, owner, status, tag association, maintenance record, and other metadata.
Asset tracking: The process of identifying and monitoring an asset’s current location, status, movement, and history. Asset tracking may use RTLS, RFID, GPS, barcodes, QR codes, or a combination of technologies.
Audit trail: A time-ordered record of events, actions, positions, and changes. RTLS audit trails can show where an asset was, when it moved, which process area it entered, and which people or equipment were present.
Automated guided vehicle (AGV): A vehicle that moves materials through a facility using programmed routes or navigation systems. RTLS can track AGV location, traffic, utilization, waiting time, and interaction with other resources.

B

Barcode: A printed visual code that represents an identifier. A scanner or mobile device reads the code to identify an asset, material, order, or location.
Batch: A defined quantity of material or product manufactured through a controlled process. In pharmaceutical manufacturing, each batch requires records that support quality, traceability, and release decisions.
Batch execution visibility: Real-time awareness of the status and progress of a production batch. RTLS can connect material, equipment, and operator movements with MES or batch-record data.
Batch record: The documented history of how a manufacturing batch was produced. It may include materials, equipment, operators, process steps, times, measurements, exceptions, and approvals.
Battery life: The period for which a powered tag, beacon, sensor, or device can operate before charging or battery replacement. Transmission rate, sensor use, temperature, and signal conditions can affect battery life.
Beacon: A device that broadcasts a radio signal containing an identifier or other data. Applications can use beacon signals for proximity detection, positioning, navigation, or location-based services.
Bed management: The process of monitoring the availability, status, location, cleaning, allocation, and movement of hospital beds. RTLS can distinguish between beds that are available, occupied, awaiting cleaning, or assigned to a department.
Bill of materials (BOM): A structured list of the parts, materials, and assemblies required to produce, repair, or maintain an item. RTLS can connect BOM requirements with the current location and availability of each required component.
Bluetooth: A wireless communication standard used by phones, computers, tags, sensors, and other devices. RTLS systems can use Bluetooth signals for proximity, zonal location, or coordinate-based positioning.
Bluetooth Low Energy (BLE): A Bluetooth technology designed for communication with low power use. BLE supports tags, beacons, smartphones, sensors, mesh networks, RSSI positioning, and angle-of-arrival positioning.
Bluetooth mesh: A network in which Bluetooth devices relay messages between nodes. A mesh can extend coverage and connect sensors or devices across buildings, campuses, and industrial spaces.
Bottleneck: A process step, location, resource, or constraint that limits flow or throughput. Location data can reveal bottlenecks by measuring queues, WIP levels, movement, and dwell time.
Building information modeling (BIM): A digital method for representing building geometry and information. RTLS platforms may use BIM data to create maps, zones, navigation routes, and relationships between physical spaces.
Building management system (BMS): A system that monitors or controls building services such as heating, cooling, ventilation, lighting, blinds, and energy use. RTLS can provide occupancy and location data to support BMS actions.

C

C-check: A scheduled aircraft maintenance inspection that involves checks of aircraft systems, structures, and components. RTLS can provide visibility of tools, technicians, parts, equipment, and work-package progress during a C-check.
CAD import: The process of importing a computer-aided design drawing into an RTLS platform. A CAD file can provide the base geometry for floors, rooms, work areas, routes, and zones.
Calibration: The process of testing and adjusting a measurement device against a reference. RTLS installations may also require calibration to align signal measurements, coordinates, maps, and physical positions.
Calibration compliance: Confirmation that a tool or instrument remains within its approved calibration period and may be used for a task. RTLS can combine calibration status with location and process-zone rules.
Carrier: A cart, rack, pallet, skid, fixture, or other item used to move or hold products and materials. Tracking carriers can provide indirect visibility of the items assigned to them.
Chain of custody: A record of who controlled, handled, moved, or received an item over time. Location events and user confirmations can support chain-of-custody records for samples, materials, tools, or regulated products.
Cleanroom: A controlled environment that limits airborne particles and other contaminants. RTLS can monitor personnel, equipment, material flow, access, dwell time, and movement between cleanroom zones.
Cloud deployment: A software deployment hosted in cloud infrastructure rather than only on servers at the customer’s facility. Cloud deployments can support remote access, centralized management, and multi-site use.
Cloud-native architecture: A software design created to operate through cloud services, containers, distributed components, and automated scaling. Cloud-native RTLS platforms can also support private cloud or hybrid deployments.
Cold chain: A temperature-controlled storage and transport process for products such as vaccines, biologics, blood products, and pharmaceutical materials. Location and sensor data can show where an item traveled and whether handling conditions remained within limits.
Co-location: The presence of two or more tracked entities within the same location, zone, or defined distance. Co-location records can help verify that a tool, operator, component, or work order came together for a process step.
Colleague finding: A workplace function that helps an authorized user find another employee’s booked workspace or permitted current location. Organizations must apply privacy, consent, and access rules to this function.
Competence finding: The process of locating a person who has a required qualification, role, certification, or skill. Hospitals and industrial sites can use competence finding during operational or emergency situations.
Computerized maintenance management system (CMMS): Software used to manage assets, maintenance schedules, work orders, spare parts, and maintenance records. RTLS can provide a CMMS with current location and asset-use data.
Contact tracing: The process of identifying people, assets, or spaces associated with a possible exposure. RTLS can support contact tracing when the system records location history and co-location events.
Contamination control: Measures used to prevent, detect, and manage contamination in environments such as cleanrooms, laboratories, hospitals, and production areas. Location rules can help enforce approved routes and zone access.
Coordinate: A numeric value that represents a position within a reference system. A two-dimensional coordinate normally uses x and y values, while a three-dimensional coordinate also includes height or elevation.
Coordinate-based positioning: A location method that reports a point on a map rather than only a room or zone. Coordinate accuracy depends on the technology, infrastructure, calculations, and environment.
Cycle time: The time required to complete a process, task, repair, production stage, or movement. RTLS can calculate cycle time from time-stamped entries, exits, movements, and process events.

D

D-check: A major aircraft maintenance inspection that involves extensive examination, disassembly, repair, and reassembly. RTLS can help coordinate tools, parts, ground equipment, technicians, and work packages throughout the check.
Data retention: The period for which a system stores location, event, asset, or user data. Organizations should define retention according to operational, legal, regulatory, and privacy requirements.
Dead reckoning: A positioning method that estimates a new position from a known position using measured direction, speed, distance, or movement. Smartphones and wearable devices may use inertial sensors for dead reckoning.
Desk booking: A workplace function that lets employees reserve a desk or workstation. Location and presence data can support availability, check-in, release, and usage reporting.
Device identity: A digital identifier assigned to a tag, phone, sensor, reader, or other device. The platform may link the device identity to a person, asset, vehicle, or material record.
Digital twin: A digital representation of a physical object, space, process, or system. Location data can update a digital twin with the current position, movement, state, and relationship of physical entities.
Digital work instruction: An electronic instruction that guides an operator through a task. It may include process steps, checks, images, documents, confirmations, and location-based triggers.
Dock scheduling: The process of planning vehicle arrivals, dock assignments, loading, and unloading. RTLS can provide actual arrival, waiting, dwell, and departure data.
Dwell time: The period that an asset, person, vehicle, or material remains within a location or zone. Dwell-time analysis can reveal delays, congestion, idle assets, and process constraints.

E

Edge computing: The processing of data near the source rather than sending every operation to a remote server. RTLS systems may use edge processing to reduce latency, filter signals, or maintain functions during network interruptions.
Electronic batch record (EBR): A digital record of the materials, equipment, actions, measurements, and approvals associated with a manufacturing batch. RTLS can supply time-stamped location evidence to an EBR or MES.
Electronic label: A digital display or connected label attached to an asset, material, container, or work item. It can show identity, instructions, status, destination, or process information.
Enterprise event bus: An integration layer that distributes events between software systems. An RTLS event bus can send location changes, alerts, status updates, and workflow events to enterprise applications.
Enterprise resource planning (ERP): Software used to manage business processes such as orders, inventory, materials, production, purchasing, and finance. RTLS can add actual location and movement information to ERP records.
Equipment utilization: A measure of how often or how effectively equipment is used. RTLS can distinguish between movement, productive use, waiting, storage, and idle time.
Evacuation routing: The calculation or presentation of a route that helps people leave a building or reach a safe area. A location-enabled system may adjust guidance according to the person’s position and known hazards.
Event: A recorded change or condition within the system. Examples include entering a zone, leaving a zone, remaining too long, approaching another asset, crossing a threshold, or pressing an emergency button.
Event-driven processing: A software method in which an event triggers a rule, calculation, notification, workflow, or integration. It allows an RTLS platform to act on location data rather than only displaying it.
Exposure time: The period for which a material, component, or product remains outside specified storage or environmental conditions. Manufacturers may track exposure time for shelf-life-sensitive materials.

F

Finished goods yard: An outdoor or indoor area used to store completed products before shipping. RTLS can associate each product with a tag and record its parking position, status, and loading sequence.
Fixed anchor: An anchor installed at a surveyed or defined location. Fixed anchors provide reference measurements for calculating the positions of mobile tags.
Fixed infrastructure: The installed components that support an RTLS deployment, such as anchors, locators, readers, gateways, antennas, servers, and network connections.
Floor plan: A drawing that represents the layout of a building floor. RTLS software uses floor plans to display locations, define zones, create routes, and connect data with physical spaces.
Foreign object debris or damage (FOD): An object, material, or condition that can damage an aircraft, engine, component, or surrounding equipment. Tool tracking can reduce the risk that tools or parts remain in controlled work areas.
Footfall: The number and movement of people through an area during a defined period. Footfall analytics can support layout, staffing, capacity, safety, and service planning.
Frequency band: A defined range of radio frequencies used for communication or positioning. Frequency affects propagation, range, data rate, interference, antenna design, and behavior around walls or metal.

G

Gateway: A device or service that transfers data between tags, sensors, networks, and software platforms. A gateway may convert protocols, filter data, or send information to cloud or on-premises systems.
Geofence: A digital boundary placed around a physical area. The system can create an event when a tracked entity enters, exits, approaches, or remains inside the geofence.
Geolocation: The process of determining the geographic or mapped position of a device, person, asset, or signal source.
Global Navigation Satellite System (GNSS): The general term for satellite navigation systems such as GPS, Galileo, GLONASS, and BeiDou. GNSS receivers use signals from satellites to calculate outdoor positions.
Global Positioning System (GPS): A satellite-based positioning system operated by the United States. GPS supports outdoor tracking across large areas but normally performs poorly inside buildings or in locations with blocked satellite signals.
Good Manufacturing Practice (GMP): Requirements and controls used to ensure that products are manufactured and managed according to defined quality standards. Location records can support evidence of equipment, material, and personnel movements.
Gowning compliance: Confirmation that personnel follow required clothing and preparation procedures before entering a controlled space. RTLS rules may combine role, training, access, and zone-entry data.
Ground support equipment (GSE): Equipment used to support aircraft while they are on the ground. Examples include tugs, power units, stands, loaders, carts, and service vehicles.
GxP: A collective term for regulated good-practice requirements such as GMP, Good Laboratory Practice, and Good Distribution Practice. The “x” represents the relevant regulated activity.

H

Hands-free access: Access to a controlled area without manually presenting a card or entering a code. The access system may use a phone, wearable, tag, or other credential detected near the entry point.
Heat map: A visual report that represents the concentration, duration, or frequency of activity across a map. RTLS heat maps can show footfall, asset use, dwell time, congestion, or movement patterns.
Heavy maintenance: Aircraft maintenance that involves extended inspections, repairs, modifications, and component work. Heavy maintenance includes activities such as C-checks and D-checks.
Horizontal scaling: The process of increasing system capacity by adding more computing instances rather than only increasing the power of one server. It can help a platform support more sites, users, events, and tracked assets.
Hot desking: A workplace model in which employees use shared desks rather than assigned workstations. Booking and occupancy data can help manage desk availability and demand.
Hybrid deployment: A system configuration that uses both on-premises and cloud infrastructure. Organizations may use a hybrid model to meet data, integration, availability, or security requirements.
Hybrid positioning: The use of two or more location technologies or calculation methods within one system. For example, a deployment may combine BLE indoors, UWB in precision zones, and GPS outdoors.

I

Indoor location tracking: The process of determining and recording the position of assets, people, or devices inside buildings or other areas where satellite positioning has limited coverage.
Indoor navigation: Digital guidance from a starting position to a destination within a building. The application may provide a map, route, directions, floor changes, and points of interest.
Indoor positioning system (IPS): A system that calculates positions inside buildings using technologies such as BLE, UWB, Wi-Fi, RFID, ultrasound, magnetic signals, or device sensors.
Inertial measurement unit (IMU): A sensor package that measures movement, acceleration, and rotation. Phones, wearables, and tags may use IMU data for motion detection, man-down alerts, or dead reckoning.
Infection control: Policies and processes used to prevent the spread of infection. Location data may support sterile routing, asset status, exposure analysis, and movement controls.
Instrument compliance: Confirmation that an instrument meets requirements for calibration, approval, maintenance, cleanliness, or use within a process. RTLS can prevent or flag the presence of an unsuitable instrument in an active work zone.
Interference: Unwanted radio energy that affects signal detection, communication, or location calculations. Sources can include other wireless systems, machinery, electrical equipment, and overlapping transmissions.
Internet of Things (IoT): A network of connected physical devices that collect, transmit, or act on data. RTLS platforms may combine location information with IoT data such as temperature, motion, occupancy, or equipment state.

J

Just-in-time manufacturing (JIT): A production method that supplies materials and components when they are needed rather than maintaining large stocks at each process stage. Location visibility can help coordinate material arrival with production demand.

K

Key performance indicator (KPI): A measure used to assess performance against an operational objective. RTLS-related KPIs may include search time, dwell time, utilization, turnaround time, throughput, asset availability, and process compliance.
Kitting: The process of collecting the parts, tools, and materials required for a task, order, or assembly. RTLS can verify that the right items reach the kit and the correct work area.
Kubernetes: Software that deploys, manages, and scales containerized applications. An RTLS platform can use Kubernetes to manage distributed services, availability, and computing capacity.

L

Laboratory information management system (LIMS): Software used to manage laboratory samples, tests, instruments, workflows, and results. RTLS can add the current location and movement history of samples or instruments.
Latency: The delay between a physical event and the availability of the corresponding information or action in the system. RTLS latency includes signal transmission, calculation, processing, network, and display delays.
Last-in, first-out (LIFO): A sequence in which the last item loaded becomes the first item removed. Vehicle and product-loading operations may use LIFO rules to support the planned delivery order.
Line maintenance: Aircraft maintenance performed during normal operations or between flights. It often requires coordination of technicians, tools, spare parts, and ground support equipment within a limited time.
Line of sight: A direct path between a transmitter and receiver without a major obstruction. Some radio technologies can operate without line of sight, but walls, equipment, people, and metal may affect signal behavior.
Line-side inventory: Materials, parts, and containers stored close to a production or assembly line. Tracking line-side inventory can help prevent shortages, excess stock, and incorrect deliveries.
LoRaWAN: A low-power wide-area network protocol used to connect devices over long distances. LoRaWAN can support sensor and asset-status applications, although location accuracy depends on the positioning method and infrastructure.
Location analytics: The analysis of positions, movements, routes, dwell times, proximity, and zone events. It converts location records into information about operations and behavior.
Location engine: The software component that converts signal measurements or device data into estimated positions. It may apply filtering, calibration, map constraints, and positioning algorithms.
Location event: An event generated from the position or movement of a tracked entity. Examples include zone entry, zone exit, unauthorized presence, prolonged dwell, or proximity to another item.
Location history: A time-ordered record of previous positions or zones associated with a tracked entity. The system may store location history according to retention and privacy rules.
Location intelligence: The use of location and movement data to understand, manage, or automate operations. It combines position with context such as asset identity, process, status, time, role, and business rules.
Location-based rule: A condition that causes the system to act according to position, presence, movement, proximity, or dwell time.
Location-based service: A digital service that changes its information or behavior according to the user’s or asset’s location. Examples include navigation, nearby asset search, room control, and contextual notifications.
Location precision: The consistency of repeated location measurements. A system can report measurements that remain close together but are not close to the true position, which means it is precise but not accurate.
Location refresh rate: How often the application updates displayed or stored location information. Refresh rate may differ from the underlying tag transmission or positioning update rate.
Locator: A fixed device that detects signals from tags, beacons, or mobile devices. Depending on the technology, it may measure signal strength, direction, timing, or other signal properties.

M

Man-down alert: An alert generated when a wearable or device detects a fall, impact, lack of movement, or defined body orientation. The alert may include the person’s identity and last known location.
Map matching: The process of adjusting a calculated position to fit known routes, rooms, floors, or permitted areas. Map matching can prevent positions from appearing through walls or outside navigable spaces.
Material flow: The movement of raw materials, parts, work in progress, containers, and finished products through an operation. RTLS can show current position, route, dwell time, and process stage.
Material handling: The movement, storage, protection, and control of materials and products. Material-handling equipment includes carts, cranes, forklifts, carriers, conveyors, and automated vehicles.
Manufacturing execution system (MES): Software that manages, monitors, and records production execution. RTLS can provide an MES with evidence of actual asset, material, and operator movements.
Metadata: Information that describes an asset, tag, person, place, or event. Examples include serial number, asset type, status, department, calibration date, work order, owner, and certification.
Microservices: A software architecture that divides an application into services responsible for separate functions. Microservices can be deployed and scaled independently.
Middleware: Software that connects devices, location systems, sensors, databases, and business applications. RTLS middleware can normalize data from different technologies into one location and event model.
Mobile-centric positioning: A positioning approach in which the mobile device calculates its own location. The device may use beacon signals, sensors, maps, and positioning algorithms.
MQTT: A messaging protocol designed for communication between devices and systems. IoT and RTLS deployments can use MQTT to publish and receive sensor, status, and location messages.
Maintenance, repair, and overhaul (MRO): The work required to inspect, maintain, repair, modify, and restore aircraft, vehicles, engines, equipment, and components.
Multipath: A radio effect in which a signal reaches a receiver through several paths after reflecting from walls, metal, equipment, or other surfaces. Multipath can distort signal strength, angle, and timing measurements.
Multi-floor positioning: The ability to determine the floor as well as the horizontal location of a device. Reliable floor detection prevents the system from placing an entity on the wrong level.
Multi-site deployment: An RTLS implementation that operates across more than one facility, campus, or geographic location. A central platform may provide common data, rules, reporting, and administration.

N

Near-field communication (NFC): A short-range wireless technology used when devices or tags come within a few centimeters of each other. NFC can start an application, identify a location, confirm an action, or provide access to a service.
Network-centric positioning: A positioning approach in which fixed infrastructure or a central server calculates the location of the mobile device or tag.
Nurse visit certification: A record that confirms a nurse or clinical team member was present in a defined patient area. Location evidence may supplement, but should not replace, required clinical documentation.

O

Occupancy: The number or presence of people within a room, floor, building, or other area. Occupancy can be measured through RTLS, sensors, booking systems, access control, or combined data.
Offline mode: The ability of an application to continue providing selected functions without a network connection. Data can be stored on the device and synchronized when connectivity returns.
On-premises deployment: A software deployment operated on infrastructure controlled by the customer or located at the customer’s site.
Operational intelligence: Information derived from current and historical operational data. In RTLS, this may include location, movement, dwell, utilization, process status, exceptions, and predicted constraints.
Outdoor positioning: The process of locating assets, people, or vehicles outside buildings. GPS and other GNSS technologies commonly support outdoor positioning.

P

Passive RFID: RFID technology in which a tag has no battery and receives power from the reader’s radio signal. Passive RFID is often used for identification, inventory, and checkpoint-based tracking.
Path analysis: The study of the routes followed by people, assets, vehicles, or materials. It can reveal unnecessary travel, route deviations, congestion, and process variation.
Patient flow: The movement of patients through appointments, departments, waiting areas, tests, treatment, and discharge. Location data can identify queues, delays, and capacity constraints.
Patient wayfinding: Indoor navigation designed to help patients reach departments, rooms, clinics, and services. It may operate through kiosks, signs, smartphones, or QR handoff between devices.
Picker route: The path followed by a warehouse operator while collecting items. Route optimization can reduce travel time and improve picking throughput.
Picking list: A list of items that an operator must collect, move, load, or prepare. A digital picking list may include location, sequence, quantity, and confirmation requirements.
Picking mission: A defined assignment that guides an operator through one or more collection and delivery tasks. The system may optimize the order and record each completed step.
Pick-to-light: A system that uses lights or displays to direct an operator to the correct storage position. RTLS and workflow software can connect pick-to-light activity with orders and material records.
Point of interest: A defined destination or reference location on a digital map. Examples include rooms, equipment, desks, entrances, departments, workstations, and emergency facilities.
Position: An estimate of where an entity is located. A position may be represented as a coordinate, room, zone, floor, geographic coordinate, or proximity relationship.
Positioning engine: See location engine.
Predictive planning: The use of current and historical data to estimate future resource needs, delays, maintenance demand, or capacity constraints.
Presence: Confirmation that a person, asset, or device is within a defined area. Presence does not always require an exact coordinate.
Process verification: The use of records or system rules to confirm that a process step occurred under the required conditions. RTLS can verify presence, sequence, co-location, time, and movement.
Proximity: A measure or state indicating that two entities, or an entity and a location, are close to each other. Proximity does not always provide an exact distance.
Personal protective equipment (PPE): Clothing or equipment used to reduce exposure to workplace hazards. Location and identity rules can help check PPE-related access conditions when PPE is tagged or digitally recorded.
Proof of concept (PoC): A limited implementation used to test whether a technology can meet defined technical and operational requirements before a wider deployment.

Q

QR code: A two-dimensional visual code that a camera can scan. RTLS applications can use QR codes to identify assets, confirm tasks, establish a user’s starting location, or continue navigation on a mobile device.

R

Radio frequency (RF): Electromagnetic energy used for wireless communication, identification, sensing, and positioning.
Radio frequency identification (RFID): A technology that uses radio signals to identify tagged items. RFID systems include tags and readers and may use passive, battery-assisted, or active tags.
Ranging: The process of measuring or estimating the distance between two devices. Ranging methods include time of flight, signal strength, phase, and round-trip timing.
Reader: A device that communicates with or detects RFID tags, barcodes, or other identifiers. An RFID reader may identify tags at a doorway, workstation, shelf, or process point.
Real time: A level of system response fast enough to support the intended operation. “Real time” does not have one fixed delay and should be defined according to the use case.
Real-time locating system: An alternative expansion of the abbreviation RTLS. The term generally refers to the same category as a real-time location system.
Real-time location system (RTLS): A system that identifies and determines the current or recent location of assets, people, vehicles, materials, or devices. An RTLS normally combines tags or mobile devices, location infrastructure, positioning software, maps, and applications.
Received signal strength indicator (RSSI): A measurement of the power of a received radio signal. Systems may use RSSI to estimate proximity or distance, although walls, people, metal, orientation, and interference can affect the measurement.
Receiver: A device or component that detects a radio signal. In RTLS, receivers may be called anchors, locators, sensors, access points, or readers.
Restricted zone: An area that only authorized people, assets, or vehicles may enter. RTLS can generate an alert when a tracked entity enters or approaches the zone.
RFID reader: A device that transmits and receives radio signals to detect and exchange data with RFID tags.
Room booking: A workplace function that lets a user reserve a meeting room or shared space. Integration with calendars, room panels, occupancy, and presence data can help manage availability.
Room-level location: A location result that identifies the room containing an entity without necessarily calculating its exact coordinate within that room.
Rotable: An aircraft component that can be removed, repaired or overhauled, and returned to service. Rotable tracking supports component identity, location, status, and maintenance history.
Route optimization: The process of selecting a route or task sequence that reduces travel, waiting, distance, or conflict.
Rules engine: Software that evaluates data against defined conditions and triggers actions. An RTLS rules engine may use location, asset type, time, role, movement, proximity, and status.

S

Scalability: The ability of a system to support growth in tracked assets, users, facilities, events, data volume, or integrations without unacceptable performance loss.
Sensor: A device that measures a physical condition such as temperature, motion, acceleration, presence, pressure, humidity, light, or air quality.
Sensor fusion: The combination of information from several sensors or positioning methods to produce a location or movement estimate.
Shelf-life tracking: The monitoring of time and conditions that affect how long a material or component remains suitable for use. RTLS can record movements and periods outside controlled storage.
Signal strength: A measure of the power of a received signal. Signal strength may support communication quality assessment, proximity detection, or RSSI-based positioning.
Single sign-on (SSO): An authentication method that lets users access connected applications through one identity provider and login process.
Single source of truth: A system or governed data model treated as the primary record for defined information. RTLS integrations should establish which platform controls asset identity, status, maintenance, and location fields.
Smart badge: A wearable device that can support identification, location, access, emergency buttons, motion detection, or man-down functions.
Smart building: A building that uses connected systems, sensors, data, and software to manage spaces, services, energy, comfort, access, and occupant experience.
Smart label: A physical or electronic label that contains digital identity or process information. It may use RFID, NFC, a barcode, a QR code, or an electronic display.
Smart locker: A locker connected to software for reservation, assignment, access, and usage monitoring. Location or presence rules can limit unlocking to a user near the locker.
Smartphone positioning: The use of a phone’s Bluetooth, GNSS, Wi-Fi, camera, and motion sensors to determine or confirm location.
Space utilization: A measure of how often and how fully rooms, desks, floors, or other spaces are used. It differs from capacity, which describes how many people a space can support.
Spatial intelligence: The use of data about position, movement, distance, areas, routes, and physical relationships to understand or control operations.
Sterile route: A controlled route used to move people, samples, equipment, or materials while reducing contamination or infection risk.
System of record: The application that holds the authoritative version of defined business data. ERP, MES, CMMS, LIMS, HR, and access-control platforms may each act as the system of record for different information.
System uptime: The proportion of time during which a system remains available for use. Uptime should be defined with measurement periods, exclusions, maintenance windows, and service-level terms.

T

Tag: A device, label, or identifier attached to or carried by a person, asset, vehicle, material, or container. A tag may actively transmit signals or respond when a reader detects it.
Tag-to-asset association: The process of linking a tag identifier with the digital record of a physical asset. This link lets the system interpret the tag’s reported position as the asset’s location.
Tag density: The number of tags that operate within an area or communicate with the system at the same time. High tag density can affect network and processing requirements.
Time difference of arrival (TDoA): A positioning method that compares the times at which the same signal reaches several synchronized receivers. The system uses the time differences to calculate the transmitter’s position.
Time of arrival (ToA): A method that uses the measured arrival time of a signal to calculate distance or position. It requires accurate timing and synchronization.
Time of flight (ToF): The time taken for a radio signal to travel between devices. Since radio waves travel at a known speed, the system can use this measurement to estimate distance.
Time-stamped record: A record that includes the date and time at which an event, position, action, or change occurred.
Tool control: The process of identifying, issuing, locating, checking, and accounting for tools. In aerospace MRO, tool control helps prevent loss, unauthorized use, calibration errors, and FOD.
Total cost of ownership (TCO): The full cost of acquiring, operating, maintaining, integrating, supporting, and replacing a system during its life.
Traceability: The ability to reconstruct the identity, location, status, handling, movement, and process history of an item or activity.
Tracking history: See location history.
Transmission rate: The frequency with which a tag or device sends a message. Increasing the rate can improve responsiveness but may reduce battery life or increase network traffic.
Triangulation: A positioning method that calculates location from measured angles between known reference points and the unknown position.
Trilateration: A positioning method that calculates location from measured or estimated distances to three or more known reference points.
Throughput: The quantity of products, materials, orders, tasks, or work completed during a defined period.
Turnaround time: The time required to complete an operation and return an aircraft, asset, order, room, or resource to its next required state. In MRO, it often refers to the period from arrival or maintenance start to release.
Turn-by-turn indoor navigation: Step-by-step instructions that guide a person through an indoor route, including changes in direction, floors, corridors, and destinations.

U

Ultra-high-frequency RFID (UHF RFID): Passive or active RFID that operates within the UHF frequency range. UHF RFID often supports longer read ranges and faster inventory scanning than lower-frequency passive RFID.
Ultra-wideband (UWB): A radio technology that transmits across a wide frequency range using short pulses. UWB systems can use time-based measurements to provide precise ranging and positioning.
Update rate: The frequency at which a positioning system calculates or publishes a new position. The required update rate depends on how quickly the tracked entity moves and how the data will be used.
Utilization: The proportion of available time during which an asset, space, or resource supports its intended purpose. A utilization calculation must define what counts as productive use.

V

Vehicle tracking: The monitoring of vehicle identity, location, movement, route, arrival, departure, and dwell time. Indoor, yard, and outdoor tracking may require different location technologies.
Visitor management: The process of inviting, registering, checking in, guiding, notifying, and controlling access for visitors. Smart building systems may connect visitor records with navigation and access control.

W

Warehouse management system (WMS): Software used to manage warehouse inventory, storage, orders, picking, packing, and movement. RTLS can add current asset and material positions to WMS workflows.
Wave planning: The grouping and scheduling of warehouse orders or picking tasks into waves. Actual location and workload data can help adjust wave execution.
Wayfinding: Guidance that helps a person understand their current position and reach a destination. Wayfinding can use signs, kiosks, mobile applications, maps, QR codes, and indoor positioning.
Wi-Fi positioning: A method that estimates device location from Wi-Fi access points and signal measurements. It may use RSSI, round-trip time, fingerprinting, or other calculations.
Work in progress (WIP): Materials, components, products, or assemblies that have entered a process but are not complete. RTLS can show WIP location, status, queue, dwell time, and process stage.
Work order: A record that authorizes and describes maintenance, production, inspection, repair, or service work. It may specify the asset, tasks, parts, tools, personnel, dates, and status.
Work package: A defined collection of related work orders, tasks, documents, resources, and requirements. Aerospace maintenance organizations use work packages to control and record maintenance activity.
Workflow: A defined sequence of tasks, decisions, movements, and information exchanges used to complete a process.
Workflow orchestration: The coordination of tasks, systems, people, assets, and events across a workflow. RTLS can trigger or verify workflow steps according to actual location and movement.

Y

Yard management: The coordination of vehicles, trailers, containers, equipment, and finished goods within an outdoor storage or staging area.
Yard positioning: The process of identifying the parking, storage, or staging position of a vehicle, trailer, container, or finished product within a yard.

Z

Zone: A defined area on a digital map. A zone may represent a room, workstation, storage area, safety boundary, process stage, loading bay, cleanroom, or outdoor region.
Zone access control: The use of identity, role, certification, status, and location rules to control or monitor entry into a defined area.
Zone dwell time: The length of time that a tracked entity remains inside a defined zone.
Zone entry event: An event generated when a tracked entity crosses into a defined zone.
Zone exit event: An event generated when a tracked entity leaves a defined zone.
Zone-based geofencing: The use of mapped zones to generate events, alerts, workflow actions, or access decisions.
Zonal positioning: A location method that determines which zone contains an asset, person, or device rather than calculating an exact coordinate.
Z-axis: The coordinate used to represent height or vertical position in a three-dimensional positioning system.

Frequently Asked Questions

How often is this glossary updated?

We extend it over time as new RTLS concepts, BlueGPS capabilities, and industry terms become relevant. New entries are added under the matching letter.

Can I suggest a term to add?

Yes. If a term you need is missing, contact us and we will consider adding it with a clear, vendor-neutral definition.

Do these definitions describe guaranteed product performance?

No. Definitions are general. System accuracy, range, update rate, and performance depend on the selected technology, system design, operating environment, and use case.

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