Suppose in Problem 10.74 it takes the picker, on average, 20 seconds to complete a pick. Further suppose the picker spends 0.80 minute at the P/D station between successive trips.

a. Assuming that the pick points are sequenced in an optimum fashion, compute the throughput capacity of the system in picks per hour.

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

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