Examine The Desk Relationship First
Place the chair at its intended workstation and ask the user to perform a representative task. Office chairs with fixed seat and back height provide no seat-height control to refine the vertical relationship with that desk. Assess foot support, equipment access and clearance beneath the working surface. Record the actual seat level rather than relying on a broad impression of chair size. If the arrangement is unsuitable, identify the specific difficulty before considering changes elsewhere. The assessment should establish how the person, chair and desk work together, rather than assuming that matching furniture styles also produce matching working dimensions.
Judge Backrest Placement As A Fixed Relationship
Ask the person to sit back and describe where the backrest contacts them. There is no separate back-height setting to reposition it vertically relative to the seat. Its actual shape and dimensions therefore deserve careful assessment for each intended user. Office chairs should be observed during work as well as while the person sits still, because the task may change their position. Record any difficulty maintaining the assessed relationship while reaching equipment. Avoid interpreting fixed back height as evidence about recline or other movement; those functions remain separate questions unless their presence or absence has been confirmed independently.

