Consider an in-the-aisle order picking system based on the person-on-board AS/RS.

Suppose the storage rack is 400 long and 80 tall. The S/R machine travels at a constant speed of 450 fpm and 90 fpm in the horizontal and vertical directions, respectively.

On each trip, the picker performs eight picks on average.

a. Assuming that the pick points are sequenced in an optimum fashion, compute the expected travel time required to complete a trip with eight picks.

b. Solve part (a), assuming that the two-band heuristic is used.

c. Solve part (a), assuming that the four-band heuristic is used.