Build The Assessment Around Daily Activities
Choose representative tasks before asking the employee to explore settings. Office chairs with armrests and height-adjustable backrests should be assessed through the activities that define the workstation, including changes between them. Note how the person uses the backrest while typing and where their forearms sit during pointing-device work. Then introduce back-height adjustment and compare the resulting positions. This creates a task-based reference for judging each change. It also prevents a control demonstration from becoming the whole assessment, since the important result is how the person works with the backrest and arms in their usual desk arrangement.
Compare Back Contact At Different Heights
Show the user how to identify and operate the back-height control, following the chair's operating instructions. Ask them to try available heights and describe the difference in contact with their back. Observe whether the chosen position remains useful as attention returns to work. When assessing office chairs, distinguish adjustment availability from a suitable adjustment range for the individual. Neither the backrest's shape nor its travel is established here. A record of useful positions and unresolved concerns makes later comparison more informative than a general statement that the backrest can be moved up and down during setup.

