Workstations should let workers work upright with shoulders neutral and upper arms close to the trunk most of the time, without large reaches, and work surfaces should adjust to suit a range of workers. If adjustment is not possible, set height to suit the widest range of workers, reach distances to suit shorter workers and knee and leg clearance to suit larger workers. Office workstations should be flexible, large enough for the range of tasks and easily adjustable, and adjusting should not itself be a hazardous manual task. Working heights: tasks with high visual demand above elbow height with tilting where needed; tasks with hands making narrow movements and resting on the surface at or just above elbow height; light manipulative or keyboard tasks just below elbow height; tasks using a range of shoulder movements between hip and shoulder height; tasks needing considerable muscular effort or body leverage at hip height and no higher. Place items in front of the worker between waist and shoulder, near the body's middle, facing the worker, on the preferred side, within comfortable reach, avoiding double handling and long manual carries. Place frequently used displays and controls in front, controls at elbow height, use electronic or foot controls where high force would be needed by hand and place pedals for comfortable seated operation.
The graph holds this control, the 0 it maps to, and the evidence behind each claim, over MCP and REST.