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Warehouse robots and people work together in several ways: robots may move goods through areas where employees work nearby, operate in zones kept separate from people, or perform a task designed for controlled direct interaction. The robot’s obstacle-detection features are only one part of the arrangement. Safe operation depends on the full application—the robot, its load and attachments, controls, work area, and the tasks people perform around it.
What warehouse robots do
Industrial mobile robots (IMRs) travel through a workplace to specified locations, automating transport tasks such as moving goods between work areas. They use technologies to identify obstacles that could obstruct their route and may use obstacle- or collision-avoidance functions. A robot may work as a single unit or as part of a fleet. A manipulator can also be mounted on a mobile base, creating a mobile robot system that can both travel and handle objects. OSHA describes these categories and capabilities in its Technical Manual on robotics safety.
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The word “robot” does not describe one uniform machine. A transport-only mobile base is different from a system that includes a manipulator, end-effector (the tool that handles an object), sensors, controls, and fixtures. Those components are integrated for a particular task, and the combination affects how the system should be assessed and safeguarded. ISO’s driverless-industrial-truck category includes automated guided vehicles (AGVs), autonomous mobile robots (AMRs), bots, and automated guided carts; the labels alone do not establish how a particular system interacts with workers. See ISO’s page for the draft of ISO 3691-4.
What “working alongside” can mean
People and robots may occupy the same general facility without sharing the same space at the same time, work near one another with safeguards that control movement as a person approaches, or interact directly as part of a task. These are distinct arrangements, not interchangeable descriptions of a robot’s safety level.
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Nearby work with separation or movement controls
A transport robot may move through a warehouse while employees work in nearby areas. The application may use separation, defined operating zones, or protective functions intended to slow or stop the robot when a person enters a relevant area. The actual design depends on the task and the risk assessment; the presence of sensors does not, by itself, show what distance or response is safe for a given system.
Direct interaction
OSHA defines collaborative industrial robot applications as those “designed for direct interaction with workers.” Some applications use hand-guided control: a worker physically directs the robot using a hold-to-run control, which requires an intentional input to keep movement going. Another technique is power-and-force-limited operation, in which contact is expected and safety functions limit forces and pressures. Neither technique is a blanket assurance that contact with any robot, load, or attachment is safe. The specific application still needs safeguards suited to its hazards.
Separate operation
Not every mobile robot application is collaborative. OSHA says applications that do not need direct worker interaction are typically separated using traditional machine safeguarding. A system that shares a building with workers may therefore be designed to keep people out of its operating area during certain tasks, rather than to invite close interaction. OSHA’s robotics guidance distinguishes collaborative from non-collaborative applications.
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How safety is designed around the task
A safety assessment considers the complete application rather than treating obstacle detection as proof that a system is safe. OSHA recommends considering whether people need to be present, whether they share a workstation or workpiece with the robot, where each task happens, how workers reach those locations, and whether contact while the robot is moving is expected. The answers help determine the protective functions and other safeguards that are needed.
Relevant factors include the robot’s configuration, its load and end-effector, controls and protective functions, the operating zone, foreseeable misuse, and work such as setup or maintenance. Floor and zone conditions also matter: ISO’s draft standard page says operating-zone condition significantly affects safe operation and includes zone preparation within its scope. The same robot can present a different risk when its task, attachments, route, surroundings, or maintenance conditions change.
Protective functions and safeguards
Depending on the application, examples of protective functions include protective stops, limits on force or speed, position or space limits, and presence-sensing devices. These measures must be selected for the hazards and the way people use the space. Detection is only useful as part of a system whose controls respond appropriately under the conditions for which it is intended.
In a shared area, visual delineation can help workers understand where activity occurs. OSHA gives a diagram, painted floor lines, or another clear communication method as examples. Entry and exit procedures, training, lockout/tagout procedures, and signs can also support safe work. Markings and signs are administrative aids; they do not replace suitable safeguarding or make an inadequately protected system safe on their own.
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Hazards do not stop when routine production stops
A moving robot can strike a worker, and people can be crushed or trapped by a robot, its load, or surrounding equipment. OSHA also identifies projectiles from failed equipment or workpieces, electrical hazards, and other hazards associated with robot systems. Which risks apply depends on the actual machine and job; a transport base, an attached manipulator, and the object being carried may create different exposure points.
Non-routine work deserves specific attention. Programming, maintenance, testing, setup, and adjustment can bring workers into a robot’s working envelope, even if they normally remain outside it during production. OSHA’s Robotics overview highlights these activities as circumstances in which workers may enter that envelope. A plan that accounts only for normal movement along a route leaves out work that can change how the robot operates or where a person must stand.
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What workers should know in a robot area
Workers need instructions for the actual site and application, not assumptions based on a robot’s name or appearance. Before working in or near a robot area, they should know the relevant zones, how to enter and leave them, what the system is expected to do when a person approaches, and which procedures apply to their task. OSHA identifies training, clear delineation, entry and exit procedures, signs, and lockout/tagout procedures among measures that can support safe operation.
If a task requires a person to work inside the robot’s operating area—for example, during maintenance or adjustment—the worker should follow the site’s applicable procedures rather than relying on the robot’s normal obstacle-avoidance behavior. Normal operation and work inside the working envelope are not the same condition. The appropriate controls depend on the equipment, task, and workplace procedures.
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- Which tasks are transport-only, and which involve a manipulator or other handling equipment?
- Do people need to enter the operating zone, share a workstation or workpiece, or make contact with the moving system?
- How does the robot detect a person or obstacle, and which protective function responds?
- What hazards come from the load, end-effector, route, surrounding equipment, and operating-zone conditions?
- How are setup, testing, maintenance, adjustment, and recovery handled?
- Do workers understand zone markings and entry procedures, and are those measures backed by appropriate safeguards?
A practical way to assess a deployment
When reviewing a warehouse robot arrangement, evaluate the application rather than ranking robot labels such as AGV or AMR as if either label guaranteed a particular safety approach. Compare the work and safeguards on the dimensions OSHA and ISO identify as relevant.
| Assessment area | Questions to answer | Why it matters |
|---|---|---|
| Task and equipment | Does the system transport goods only, or also manipulate them? What load, end-effector, controls, and surrounding equipment are involved? | The complete integrated system creates the hazards to assess; the mobile base alone may not describe the application. |
| People and space | Are workers separated, nearby, sharing a workstation or workpiece, or expected to interact directly? Where do they need to go? | The interaction model and access routes inform the safeguards and procedures needed. |
| Protective response | Which protective stops, speed or force limits, position or space limits, or presence-sensing devices apply? | Obstacle detection alone does not establish that the system responds safely for the task. |
| Work outside normal production | How are programming, testing, setup, maintenance, adjustment, and access to the working envelope controlled? | People may face different hazards when the robot is not following its routine production behavior. |
| Zone and communication | Are operating areas and entry routes clearly communicated, and how are workers trained? | Markings, procedures, and training support safe operation but do not replace engineering safeguards. |
This is a review framework, not a substitute for a competent, application-specific risk assessment. A change in load, attachment, route, operating zone, or task can affect the assessment and may require the safeguards and procedures to be reconsidered.
What OSHA and ISO say about standards
For U.S. readers, OSHA’s Robotics overview says, “There are currently no specific OSHA standards for the robotics industry.” That statement is specifically about robotics-industry-specific OSHA standards; it does not mean that other workplace safety obligations do not apply. OSHA also explains that national consensus standards and ISO documents are guidance from their originating organizations, not OSHA regulations. See its Robotics standards page.
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ISO 3691-4:2023 is the published second edition covering safety requirements and verification for driverless industrial trucks and their systems. ISO’s page for the third-edition draft says it is under development and in the enquiry phase, and that it is intended to replace the 2023 edition. The draft includes AGVs and AMRs among its examples. Because standards status can change, organizations should check the applicable edition and its status for their jurisdiction and use case. The published edition is listed on ISO’s ISO 3691-4:2023 page; the draft’s status is shown on ISO’s draft page.
What the evidence does—and does not—establish
Official safety guidance explains the functions mobile robots can perform, the kinds of interaction possible, and how hazards and safeguards should be considered. It does not, by itself, establish a typical warehouse productivity gain, injury-rate reduction, or employment effect. Such outcomes would require evidence about specific deployments and conditions; they should not be inferred from a robot’s capabilities or from safety guidance.
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