exercises
Exercises are self-motivated activities to keep fit. Here at the CPM tutor, exercises are provided to assist you to practice what you have learned in previous sections of the tutorial. The exercises in Chapter 9 are provided to assist you to assess your understanding of the management techniques discussed in Chapter 8.
exercise 3
a. Answer the following questions regarding the time cost tradeoff analysis procedure:
(1) Can activity durations be decreased by changing the crew size, hours worked per day, or equipment used to complete the work? Provide two examples to backup your answer.
(2) How, specifically, does decreasing the overall duration of a project increase the duration of the project? When might this not hold true? Provide the answer to each question plus one example to back up your assertion.
(3) How, specifically, would early completion incentives impact the time-cost tradeoff analysis?
b. Complete the time cost tradeoff analysis on the following network.
| Activity | Prior | Normal | Crash | ||
|---|---|---|---|---|---|
| Duration | Cost | Duration | Cost | ||
| 5 | none | 2 | $2,400 | 2 | $2,400 |
| 10 | 5 | 10 | $5,000 | 10 | $5,000 |
| 15 | 5 | 15 | $3,000 | 7 | $3,800 |
| 20 | 10 | 5 | $5,000 | 2 | $6,500 |
| 25 | 15 | 3 | $1,800 | 3 | $1,800 |
| 30 | 10 | 9 | $4,500 | 9 | $4,500 |
| 35 | 20,25 | 5 | $6,000 | 5 | $6,000 |
| 40 | 25 | 6 | $3,600 | 4 | $4,200 |
| 45 | 30, 35, 40 | 4 | $4,800 | 4 | $4,800 |