Make The Armrest Movements Explicit
Ask for a demonstration of every adjustment provided by the proposed 4D armrests. The description indicates extensive adjustability, but the exact directions, control arrangement and movement limits need confirmation for the chair. Have users identify the positions they need for their work, then check whether those positions can be achieved and repeated. Record the practical result rather than relying on the term alone. This also creates a clearer brief when comparing chairs whose armrests share a description but may operate differently or offer different usable positions at the same workstation.
Check The Relationship With The Desk
Arm supports should be assessed where the chair will actually be used. Consider the height and shape of the desk, the user's position relative to the work surface and any clearance needed when approaching or leaving it. A suitable armrest position needs to coexist with a suitable seated position. Ask the user to carry out the relevant tasks and change position as they normally would. Note where an adjustment helps and where a desk or chair dimension limits the result, so that the final decision addresses the whole workstation.
