Match Existing Contact Points To The Person
Approach office chairs with fixed arms and fixed-height backrests as a fit assessment involving two set positions. Ask users to sit as they normally would while completing a familiar task. Note where the backrest contacts the back and where the elbows meet the arms. If either position is unsuitable, identify that issue directly rather than searching for a control that the feature does not have. Other settings may affect the overall sitting position, but their presence and practical effect must be checked individually before drawing conclusions about whether the chair suits that person.
Reproduce The Workstation Arrangement
A trial away from the desk leaves an important part of the comparison unanswered. Bring the chair to the intended working surface and check how closely the user can approach it. Observe whether fixed arms meet the desk edge, constrain movement or interfere with nearby furniture. Use ordinary keyboard, mouse and document positions rather than arranging an artificial demonstration. Office chairs should be evaluated with the workstation in its normal configuration wherever possible. This reveals whether an apparent seating issue comes from the chair's fixed geometry, the desk arrangement or their relationship in practice.

