A manager wants to assign tasks to workstations as efficiently as possible, and achieve an hourly output of 331/3 units. Assume the shop works a 60-minute hour. Assign the tasks shown in the accompanying precedence diagram (times are in minutes) to workstations using the following rules:
a. In order of most following tasks. Tiebreaker: greatest positional weight.
| Work Station |
Tasks |
| I |
AA, BD,C,FB, EG,H |
| II |
B, E, DG, HA, BD, C, FB, E |
| III |
D, CD, C, FC, FF, G, HF, G |
| IV |
F, G, HF, GF, HG, HD, C, F |
b. In order of greatest positional weight.
| Work Station |
Tasks |
| I |
A, EAB, EB, E, DA, B |
| II |
B, EB, E, DA, BG, HD, C, F |
| III |
G,HD, C, FA, BC, B, FB, E |
| IV |
AB, EB, E, DD, C, FG, H |
c. What is the efficiency?