5.4 Workstation Design and Computer Work
Key Takeaways
- Workstation design should fit the range of workers and the actual task, not only an average worker.
- Neutral posture, adjustability, appropriate reach, visibility, and stable support reduce physical demand.
- Computer work concerns include monitor position, keyboard and pointing-device placement, seating, lighting, glare, and work-rest patterns.
- A good workstation makes frequent tasks easy to reach and keeps forceful or precise work in a stable body position.
Workstation Fit And Task Design
A workstation should fit the work and the workers who perform it. The design goal is not a perfect posture frozen in place. It is a task layout that allows neutral positions, variation, appropriate force, clear visibility, and efficient movement without repeated extreme reach or sustained static loading.
Anthropometry is the study of human body dimensions. On the exam, the practical point is that workers vary. A station designed only for an average-sized person may create shoulder elevation for a shorter worker or trunk flexion for a taller worker. Adjustable work surfaces, footrests, movable fixtures, and flexible parts presentation can reduce those mismatches.
| Workstation feature | Ergonomic purpose |
|---|---|
| Work height | Match precision, light assembly, heavy work, and worker stature. |
| Reach zone | Keep frequent items close and occasional items farther away. |
| Seating and standing support | Reduce static loading and allow posture changes. |
| Visibility | Place displays, labels, and parts where the worker can see without neck strain. |
| Edge design | Prevent contact stress at forearms, wrists, thighs, and knees. |
| Lighting | Support visual task demands without glare or awkward leaning. |
Computer work is a common workstation example. The monitor should support a comfortable head and neck position. The keyboard and pointing device should allow relaxed shoulders, elbows near the body, and wrists that are not forced into extreme positions. The chair should support the user and permit stable posture, but a good chair does not fix a desk, monitor, or workload problem by itself.
Standing work needs the same level of analysis. A standing station may create foot, back, or leg discomfort if the worker cannot vary posture, use a foot support, or work at an appropriate height. Anti-fatigue mats can support standing work, but they should not be used to excuse poor reach, high force, or long static posture.
Workstation design should also consider task sequence. Parts should arrive in the order used. Heavy or frequently handled items should be placed near the body and between about knee and shoulder range when possible. Precision tasks generally benefit from support and visibility. Forceful tasks usually require a stable body position and may need a lower work height than fine assembly.
A common exam trap is choosing adjustability without implementation. An adjustable station is only useful if workers know how to adjust it, supervisors allow adjustment time, and maintenance keeps it functional. The safety professional should verify use in the field and correct barriers.
The best workstation answer usually changes the layout, equipment, or method so the job can be performed with less reach, less force, better support, and more variation. Training then helps workers use the design properly.
A short worker must raise both shoulders to assemble parts on a fixed-height bench. Which control most directly addresses the workstation mismatch?
Which item should be placed in the primary reach zone?
What is the main limitation of relying only on a new chair to solve computer workstation complaints?