题目
Problem
| Activity | Immediately preceding activities |
|---|---|
| A | – |
| B | – |
| C | – |
| D | A |
| E | A, B, C |
| F | A, B, C |
| G | C |
| H | D, E, F |
| I | F |
| J | F, G |
| K | F, G |
(a) Draw the activity network described in the precedence table above, using activity on arc and the minimum number of dummies.
(5)
Given that
- activity D has a duration of 2 hours
- activity I has a duration of 2 hours
- every other activity has a duration of 1 hour
- D and I are critical activities
(b) determine which other activities are critical.
(1)
题目中文翻译
| 活动 | 紧前活动 |
|---|---|
| A | – |
| B | – |
| C | – |
| D | A |
| E | A, B, C |
| F | A, B, C |
| G | C |
| H | D, E, F |
| I | F |
| J | F, G |
| K | F, G |
(a) 使用弧表示活动和最少数量的虚活动，画出上述紧前活动表描述的活动网络。
已知
- 活动 D 持续时间为 2 小时
- 活动 I 持续时间为 2 小时
- 其他每个活动持续时间为 1 小时
- D 和 I 是关键活动
(b) 确定其他哪些活动是关键活动。