Begin With The Working Surface
EN 1335 office chairs without armrests leave forearm support to the way the user and workstation are arranged. Establish where the keyboard, pointing device and paperwork will sit before assessing the chair. Otherwise, a change in equipment position can obscure what the seating itself contributes to the working arrangement.
Ask each participant to settle into a normal task rather than adopt a demonstration pose. Observe shoulder position, reach and contact with the desk edge. The aim is to understand the whole arrangement, including any tendency to lean forward or hold the arms away from the body during work.
Check Access Through Real Movements
The absence of armrests removes one possible point of contact with the desktop, but it does not establish how close every user can sit. Seat dimensions, desk structure and personal proportions remain relevant. Inspect the approach to the working surface from the position required for the person's usual activities.
Include entry, exit and changes of direction in the trial. Ask users to reach for frequently handled items and turn towards adjacent work areas. Record the movements that feel restricted and identify their cause. Open sides alone should not become a substitute for checking the surrounding workspace carefully.

