The Purdue Pegboard Task is a standard test for motor skills. It consists of a board with a series of holes and three types of pieces: pegs, washers and standoffs, stored in a depression at the top of the board. The assembly, with the board rotated perpendicular to the operator's torso, is as follows:
a) Right hand picks up a peg and inserts it into a hole with a tight clearance.
b) As the peg is inserted, the left hand picks up a washer and mounts it on the peg (0.01 inch clearance)
c) As the washer is mounted, the right hand picks up a standoff and mounts it on the peg on top of the washer (0.01 in clearance)
d) As the standoff is mounted, the left hand picks up another washer and mounts it on the peg on top of the standoff (0.01 in clearance)
e) As the washer is mounted, the right hand picks up another peg and starts a new assembly in the next hole down. The hands keep alternating in picking up pieces and completing assemblies.
Develop an MTM-2 analysis for the first complete assembly. What happens as the operator proceeds down the board? Why? Why would MTM-2 not be appropriate for this task?