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Question
| Station | Task | Time (hours) | Time left (hours) | Ready tasks (#followers) |
| A(6),B(4) | ||||
| 1 | A | 4. | B(4),C(4),D(2) | |
| C | 2. | 2. | B(4),D(2) | |
| 2 | B | 6. | 2. | D(2),E(2),F(2) |
| 3 | D | 6. | 2. | E(2),F(2) |
| 4 | E | 3. | 5. | F(2) |
| F | 3. | 2. | G(1) | |
| 5 | G | 5. | 3. | H(0) |
| H | 1. | 2. | ||
| Summary Statistics | ||||
| Cycle time | 8 | hours | ||
| Time allocated (cycle time * #) | 40 | hours/cycle | ||
| Time needed (sum of task times) | 30 | hours/unit | ||
| Idle time (allocated-needed) | 10 | hours/cycle | ||
| Efficiency (needed/allocated) | 75% | |||
| Balance Delay (1-efficiency) | 25% | |||
| Min (theoretical) # of stations | 4 |
(b) The cycle time is 160/20 = 8 hours; (c) This line requires at least 30/8 = 3.75 or 4 stations; (d) A and C are in Station 1; B is in Station 2; D is in Station 3; E and F occupy Station 4; and G and H are in Station 5. (e) Efficiency is 30/40 = .75 or 75 percent.
Key Term: Assembly-line balancing
45) Hemo-tech, Inc., a biomedical technology and research laboratory, produces a standard blood filtering device on an assembly-line basis. Six basic tasks are performed along the assembly line. The time to perform each task and the tasks that must immediately precede each task are in the table below. Twenty pumps per 450-minute day must be produced by the assembly line.
Answer
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