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Question
The following table contains a list of activities, with early- and late-start and finish times and crash costs for the network shown in the figure. All start and finish times and crash costs are on a per-week basis. Each activity can be reduced by one week at the most.
a. Determine the uncrashed activity lengths for activities A though K.
b. Determine the minimum completion cost for this project if each week carries a fixed cost of $1,000.
| Activity | ES | EF | LS | LF | Crash Cost/week |
| A | 0 | 5 | 0 | 5 | $1,100 |
| B | 5 | 9 | 13 | 17 | $250 |
| C | 5 | 11 | 5 | 11 | $1,200 |
| D | 0 | 6 | 1 | 7 | $350 |
| E | 6 | 10 | 7 | 11 | $900 |
| F | 9 | 14 | 17 | 22 | $875 |
| G | 11 | 17 | 16 | 22 | $1,500 |
| H | 11 | 18 | 11 | 18 | $500 |
| I | 18 | 26 | 18 | 26 | $300 |
| J | 17 | 21 | 22 | 26 | $625 |
| K | 26 | 34 | 26 | 34 | $750 |
Answer
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