Question

1. When finding the approximate probability of project duration, it is necessary to know which of following?

a. The mean and variance of each activity

b. The mean of each activity on the CP

c. The sd of only the activities on the CP

d. Each activity's probability of completion

e. The distribution of activity times

2. The sd of a path is computed as:

a. the sum of the sd of all activities on the path

b. the square root of the sum of the sd of all activities on the path

c. the sum of variances of all activities on the path

d. the square root of the sum of variances of all activities on the path

e None of above

3. An activity has an optimistic time estimate of three days, a most like time estimate of eight days, and a pessimistic time estimate of ten days. The expected duration of the activity is?

4. Activity C in a project network has an optimistic time estimate of five days, a most like time estimate of seven days, and a pessimistic time estimate of nine days. The expected duration of the activity is?

5. There are four activities on the critical path, and they have sd of 1,2,4 and 2 days. The sd of the critical path is?

6. There are four activities on the critical path. Coincidentally, their sd are all equal to 4. The sd of the critical path is therefore equal to?

7. The project management strategy of injecting additional resources in order to reduce the length of the project is called?

8. In crashing a project, a manager will generally focus on activities which:

a. are not on the critical path

b. are the least costly to crash

c. are costly to crash and are on the critical path

d. are on the cp and are the least costly to crash

e. none of above

9. At which point does crashing of a project cease?

a. when the project is completed

b. when no additional crashing is possible

c. when the cost to crash equals or exceeds the benefit of crashing

d. all of above

e. none of above

10. which of the following are ways of crashing an activity?

a. using overtime

b. hiring more workers

c. using specialized equipment

d. all of the above

e. none of the above

11. When using linear programming to make crashing decisions, the objective is to minimize

a. the total cost of crashing the project

b. the total of the durations of the activities on the cp

c. the latest finish time of the finish node

d. the total number of activities on the cp

e. none of the above

12. PERT/Cost

a. finds the penatly cost if a project is not completed on time

b. compares the actual budget with the planned budget

c. shows management where to focus attention during the project

d. a and b only

e. b and c only

Answer 1

1. b - The mean of each activity on the CP

2. d. the square root of the sum of variances of all activities on the path

3. Pert Estimate = (Optimistic + (4 X Most Likely) + Pessimistic)/6

Pert Estimate = (3+(4*8)+10)/6 = 45/6 = 7.5 days

4. Pert Estimate = (Optimistic + (4 X Most Likely) + Pessimistic)/6

Pert Estimate = (5+(4*7)+9)/6 = 42/6 = 7