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Question
| Station | Task | Time (minutes) | Time left (minutes) | Ready tasks (#followers) |
| A(4),B(4),D(1),E(2) | ||||
| 1 | A | 4 | 4.6 | B(4),D(1),E(2) |
| B | 0.8 | 3.8 | D(1),E(2),C(3) | |
| C | 0.4 | 3.4 | D(1),E(2),F(2) | |
| E | 0.4 | 3. | D(1),F(2) | |
| F | 2.1 | 0.9 | D(1),G(1) | |
| 2 | D | 1.8 | 4.2 | G(1) |
| G | 2. | 2.2 | H(0) | |
| H | 1.2 | 1. | ||
| Summary Statistics | ||||
| Cycle time | 6 | minutes | ||
| Time allocated (cycle time * #) | 12 | minutes/cycle | ||
| Time needed(sum of task times) | 10.1 | minutes/unit | ||
| Idle time (allocated-needed) | 1.900001 | minutes/cycle | ||
| Efficiency (needed/allocated) | 84.16666% | |||
| Balance Delay (1-efficiency) | 15.83334% | |||
| Min (theoretical) # of stations | 2 |
Key Term: Assembly-line balancing
44) A firm operates a flow shop building kitchen cabinetry for recreational vehicles. The major activities of this process are listed below.
| Task | Duration (hours) | Predecessor 1 | Predecessor 2 | Predecessor 4 |
| A | 4 | -- | ||
| B | 6 | -- | ||
| C | 2 | A | ||
| D | 6 | A | ||
| E | 3 | B | C | |
| F | 3 | B | C | |
| G | 5 | D | E | F |
| H | 1 | G |
a. Draw the appropriate network for this project.
b. What would the cycle time be if the goal is to produce 20 units per month (the plant operates
160 hours per month)?
c. What is the theoretical minimum number of workstations needed?
d. Balance with the most following tasks heuristic. What tasks are assigned to which stations?
e. What is the efficiency of the line obtained in part d?
Answer:
Answer
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