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6.2.3 | ROBOT ROLES
01 | A ROBOT’S ROLE IS ITS TASK
A robot role is the physical task or service the robot performs. The specification includes industry, transport, agriculture, medicine, domestic settings and entertainment.
For each scenario, identify what the robot does, explain a relevant benefit and consider a realistic limitation.
Some robots follow sequences, some respond to sensor data, and some use direct operator commands. A useful role does not require every robot to be fully autonomous or use AI.
02 | INDUSTRY: ASSEMBLY AND HANDLING
Industrial robots can handle components, position tools, weld, paint or package products. A factory arm can repeat a defined movement in a controlled workspace.
| Advantage | Why it matters |
|---|---|
| Repeatability | Apply a defined movement consistently across many items |
| Throughput | Handle repetitive operations quickly |
| Reduced exposure | Keep people away from hazardous or tiring operations |
Disadvantages: purchase and integration can be expensive. Programming and maintenance need specialist skills. A fault may halt production or repeat an incorrect action across many products.
Changing the product can require new tooling or software. Safe working arrangements are necessary; repeatable motion does not automatically make a robot safe around people.
03 | TRANSPORT: MOVING ITEMS
Warehouse robots can move goods between locations. Delivery robots can carry items over a defined route, subject to their design and operating conditions.
Advantages: reduce repeated carrying tasks, support regular routes and move goods through suitable spaces with less manual effort.
Disadvantages: obstacles, unusual layouts or poor sensing can interrupt movement. Batteries need charging; failures can block a route or delay deliveries. Payload and terrain limits matter.
A warehouse route is often more controlled than a public environment. Do not assume success in one setting proves suitability everywhere.
04 | AGRICULTURE: TARGETED PHYSICAL WORK
Agricultural robots can help with tasks such as crop inspection, targeted weeding or harvesting suitable produce.
For a weeding role, sensing helps identify the target and a mechanism performs the physical action according to the controller’s rules.
Advantages: reduce repetitive labour and allow more targeted treatment where identification and actuation are reliable.
Disadvantages: weather, soil, changing plants and visibility can make the environment difficult. Incorrect identification may damage crops. Equipment needs maintenance and may be costly.
A sensor-based irrigation controller is automation, but it is not necessarily a robot. Identify the physical robotic system when the question asks about robot roles.
05 | MEDICINE: ASSISTING PEOPLE
Medical robotic systems can assist procedures or rehabilitation. For example, a clinician can control a surgical robotic instrument, while a rehabilitation device can guide a defined movement.
Potential advantages: controlled instrument movement, useful access to a working area and assistance with repeated rehabilitation exercises, depending on the procedure and design.
Disadvantages: equipment and training can be expensive. Faults or unsuitable operation can have serious consequences, so professional judgement, monitoring and appropriate safety systems remain essential.
Do not assume autonomous surgery. A robotic instrument may be controlled by a trained clinician. This is a computer science example, not medical advice or a claim that robotics always produces better clinical outcomes.
06 | DOMESTIC SETTINGS: HOUSEHOLD TASKS
Robot vacuum cleaners and robotic lawn-mowing systems perform household physical tasks within their operating limits.
Advantages: reduce repetitive manual effort and provide scheduled operation in suitable spaces.
Disadvantages: clutter, unsuitable surfaces or complex layouts can reduce effectiveness. Equipment still needs charging, cleaning or maintenance, and a person may need to prepare the area or complete missed tasks.
A domestic robot can save time without replacing every part of household work. Its performance depends on the environment and requirements.
07 | ENTERTAINMENT: PERFORMANCE AND INTERACTION
Robots can provide programmed performances, interactive exhibits or moving attractions. Their physical motion can create an experience beyond a screen display.
Advantages: repeat coordinated movements and offer engaging physical interaction. A programmed sequence can be performed consistently.
Disadvantages: equipment and maintenance add cost. Limited behaviours may become repetitive, and unexpected audience actions can challenge the design.
Movement near visitors needs appropriate supervision and safety arrangements. Human-like appearance or speech does not itself mean the robot understands the audience.
08 | MATCH THE ROLE TO THE ENVIRONMENT
| Area | Example role | Important condition |
|---|---|---|
| Industry | Handle components | Stable task, tooling and controlled workspace |
| Transport | Move goods | Suitable route, load and obstacle handling |
| Agriculture | Target weeds | Reliable identification in changing outdoor conditions |
| Medicine | Assist instrument movement | Professional control, training and safety |
| Domestic | Clean floors | Suitable surfaces, layout and upkeep |
| Entertainment | Perform an interactive routine | Audience conditions and safe interaction |
A robot suited to a predictable factory process may not adapt well to an unpredictable outdoor task. Explain the environment rather than writing “robots are good at everything”.
09 | BENEFITS YOU CAN EXPLAIN
TASK PERFORMANCE
Speed, repeatability and suitable continuous operation.
PEOPLE
Reduced repetitive work or exposure to hazards.
PROCESS
Targeted actions or reliable handling in an appropriate setting.
Continuous operation is still subject to power, wear, maintenance and the operating rules. Do not say a robot never needs to stop.
Developed benefit: “a warehouse robot can carry items along repeated routes, reducing the manual lifting required from workers”.
10 | DISADVANTAGES YOU CAN EXPLAIN
| Limitation | Possible consequence |
|---|---|
| Cost | Purchase and integration may not be justified for a small task |
| Maintenance | Downtime and specialist support can interrupt the service |
| Inflexibility | A changed task may require new tooling or programming |
| Errors and failures | Repeated wrong actions can damage products or affect safety |
| Employment changes | Some tasks may disappear while technical roles increase |
| Human interaction limits | The robot may not handle unusual social or physical situations well |
Employment effects are not identical everywhere. A robot can replace particular tasks while people remain responsible for supervision, judgement and maintenance.
11 | EVALUATE A WAREHOUSE ROBOT
A warehouse wants to move standard boxes between fixed stations.
Benefit: repeated transport can be handled with less manual carrying and consistent routing.
Limitation: installation and support cost money, and blocked routes or battery downtime can disrupt work.
Judgement: robots may be suitable for frequent, predictable movements if routes, maintenance and failure handling are planned. For rare tasks in a constantly changing space, the cost and adaptation effort may outweigh the benefit.
Writing pattern: task → relevant benefit → relevant limit → justified judgement. Use “because”, “however” and “therefore” where they make the relationship clear.
12 | COMMON MISTAKES
- Every robot is fully autonomous: operator control and automatic functions can coexist.
- Robots are always faster and safer: suitability depends on the job and design.
- Robot-assisted medicine means replacing clinicians: trained people can control and supervise the system.
- Robots never need maintenance: wear, power and faults still matter.
- One successful setting proves every setting suitable: environment and task constraints differ.
- All human jobs disappear: task changes and employment effects vary.
- A generic list is an evaluation: connect points to the scenario and conclude.