An activity in a PERT network has these time estimates: optimistic = 3, most likely = 6, and pessimistic = 8. Its expected completion time is:
6.13
5.67
5.83
5.00
Suppose a project has an expected completion time of 214 days and a variance of 100. What is the z value associated with the target completion time of 224 days? Find the closest value.
1.00
0.10
-1.00
0.16
Suppose the Earliest Start time of an activity is day 5 and the Earliest Finish time of the activity is day 8 in a CPM network. The Latest Start time of the activity is day 6. Which of the following statements is INCORRECT?
The slack time of the activity is 3 days.
The Latest Finish time of the activity is day 9.
The activity time is 3 days.
The activity is not on the critical path.
Given forecast errors of 2, 5, -10, and -3, what is the mean squared error (MSE)?
5
34.5
138
36
Suppose you are asked to determine the Lower Control Limit for a p-chart for quality control purposes. Samples are taken from the production line. The fraction defective is 0.03 and the standard deviation is 0.006 based on the samples. Set z = 3. Which of the following is the LCL of the p-chart?
0.012
0.048
0.006
0.013
Which of the following statements is INCORRECT regarding CPM and PERT?
Only critical activities contribute to the variance of the project completion time in PERT.
CPM includes uncertainty in activity times.
PERT uses Beta distribution to determine the mean activity time and the variance of an activity.
ES, EF, LS, and LF can be determined in both CPM and PERT networks.
An activity in a PERT network has these time estimates: optimistic = 2, most likely = 5, and pessimistic = 8. The variance of the activity time is:
1.00
0.50
0.25
1.21