Establish Desk Access Before Backrest Setup
With office chairs with fixed arms and height-adjustable backrests, begin by checking whether the arms allow the required approach to the desk. Ask the user to work with the keyboard and mouse in their usual locations. Look for interference between the arms, desk edge and surrounding furniture. Because the arms are fixed, their position cannot be individually reset through an armrest adjustment. Record any restriction before adjusting the backrest, so a successful change in back contact does not distract from an unresolved problem with reaching the working surface during the same seating trial.
Position The Backrest For Each User
Once desk access has been assessed, explore the available backrest height positions. Ask the person to describe where support is felt and compare adjacent settings rather than assuming the highest position is preferable. Observe the user performing a familiar task after each meaningful change. Establish how the adjustment operates and whether the chosen position is straightforward to restore. Office chairs may be shared across people with different proportions, so an adjustment that exists still needs a practical assessment of its useful positioning range for the colleagues who will actually use it throughout the week.
