Question 1

Identify several advantages of using PERT (and CPM).

Accepted Answer

The advantages include (1) its usefulnes

Question 2

Draw the AOA and AON networks for the following project and calculate the minimum project duration.

Accepted Answer

AON
 @#IMG-DLM& AOA
 @#IMG-DLM& Minimum

Question 3

Which of these statements regarding time-cost tradeoffs in CPM networks is TRUE?

Accepted Answer

A)  Crashing is possible even if there are multiple critical paths. 
B)  Crashing a project often reduces the length of long-duration, but noncritical, activities. 
C)  Activities not on the critical path can never be on the critical path, even after crashing. 
D)  Crashing shortens the project duration by assigning more resources to one or more of the noncritical tasks. 
E)  The crash time always exceeds the normal time. 
A)  Crashing is possible even if there are multiple critical paths. 
B)  Crashing a project often reduces the length of long-duration, but noncritical, activities. 
C)  Activities not on the critical path can never be on the critical path, even after crashing. 
D)  Crashing shortens the project duration by assigning more resources to one or more of the noncritical tasks. 
E)  The crash time always exceeds the normal time.

Question 4

A simple CPM network has three activities, A, B, and C. A is an immediate predecessor of B and of C. B is an immediate predecessor of C. The activity durations are A=4, B=3, C=5.

Accepted Answer

A)  The critical path is A-B-C, duration 9. 
B)  The critical path is A-B-C, duration 12. 
C)  The critical path is A-C, duration 10.5. 
D)  The critical path cannot be determined without knowing PERT expected activity times. 
E)  The network has no critical path. 
A)  The critical path is A-B-C, duration 9. 
B)  The critical path is A-B-C, duration 12. 
C)  The critical path is A-C, duration 10.5. 
D)  The critical path cannot be determined without knowing PERT expected activity times. 
E)  The network has no critical path.

Question 5

Which of the following statements regarding CPM is TRUE?

Accepted Answer

A)  The critical path is the shortest of all paths through the network. 
B)  The critical path is that set of activities that has positive slack. 
C)  Some networks have no critical path. 
D)  All activities on the critical path have their LS equal to the maximum EF of all immediate predecessors. 
E)  All activities on the critical path have their ES equal to their LF. 
A)  The critical path is the shortest of all paths through the network. 
B)  The critical path is that set of activities that has positive slack. 
C)  Some networks have no critical path. 
D)  All activities on the critical path have their LS equal to the maximum EF of all immediate predecessors. 
E)  All activities on the critical path have their ES equal to their LF.

Question 6

Identify, in order, the six steps basic to both PERT and CPM.

Accepted Answer

1. Define the project and prepare the WB

Question 7

Which of the following statements regarding time-cost tradeoffs in CPM networks is FALSE?

Accepted Answer

A)  Crashing shortens project duration by assigning more resources to critical tasks. 
B)  Crashing sometimes has the reverse result of lengthening the project duration. 
C)  Crashing must consider the impact of crashing an activity on all paths in the network. 
D)  Activities not on the critical path can become critical after crashing takes place. 
E)  A negative crash cost per period would imply that either crashing is cheaper than not crashing or that the crash time was slower than the normal time. 
A)  Crashing shortens project duration by assigning more resources to critical tasks. 
B)  Crashing sometimes has the reverse result of lengthening the project duration. 
C)  Crashing must consider the impact of crashing an activity on all paths in the network. 
D)  Activities not on the critical path can become critical after crashing takes place. 
E)  A negative crash cost per period would imply that either crashing is cheaper than not crashing or that the crash time was slower than the normal time.

Question 8

Which of the following statements about Bechtel is TRUE?

Accepted Answer

A)  Even though Bechtel is over 100 years old, the Kuwaiti oil fields was its first "project." 
B)  Bechtel is the world's premier manager of massive construction and engineering projects. 
C)  Bechtel's competitive advantage is supply chain management. 
D)  While its projects are worldwide, its network of suppliers is largely in the United States 
E)  All of these are true. 
A)  Even though Bechtel is over 100 years old, the Kuwaiti oil fields was its first "project." 
B)  Bechtel is the world's premier manager of massive construction and engineering projects. 
C)  Bechtel's competitive advantage is supply chain management. 
D)  While its projects are worldwide, its network of suppliers is largely in the United States 
E)  All of these are true.

Question 9

Three critical path activities from the same critical path are candidates for crashing on a CPM network. Activity details are in the table below.
   (a) What is the crash cost per unit time for activity A?
(b) What is the crash cost per unit time for activity B?
(c) Which activity should be crashed first to cut one day from the project's duration; how much is added to project cost?
(d) Assuming no other paths become critical, which activity should be the next activity crashed to cut a second day from the project's duration; how much is added to project cost?
(e) Assuming no other paths become critical, how much can this project be shortened at what total added cost?

Accepted Answer

(a) $1,000; (b) $800

Question 10

A(n) ________ is an organization formed to ensure that programs (projects) receive the proper management and attention.

Accepted Answer

project or

Question 11

Consider the network described in the table below.
   (a) Calculate the expected duration of each activity.
(b) Calculate the expected duration and variance of the critical path.
(c) Calculate the probability that the project will be completed in more than 28 weeks time units.

Accepted Answer

(a) See table below. (b) Tasks J-M-N-P a

Question 12

What is the objective of critical path analysis?

Accepted Answer

Critical path analysis determines the lo

Question 13

Three critical path activities are candidates for crashing on a CPM network. Activity details are in the table below.
   (a) What is the crash cost per unit time for each of the three activities?
(b) Which activity should be crashed first to cut one day from the project's duration; how much is added to project cost?
(c) Assuming no other paths become critical, which activity should be the next activity crashed to cut a second day from the project's duration; how much is added to project cost?

Accepted Answer

(a) crash cost X = $1,000 per

Question 14

A combination of effective Gantt chart use and other tactics allowed Delta to cut the average time for a plane layover by what % of the original 60-minute duration?

Accepted Answer

A)  33%, to 40 minutes 
B)  50%, to 30 minutes 
C)  20%, to 48 minutes 
D)  25%, to 45 minutes 
E)  40%, to 36 minutes 
A)  33%, to 40 minutes 
B)  50%, to 30 minutes 
C)  20%, to 48 minutes 
D)  25%, to 45 minutes 
E)  40%, to 36 minutes

Question 15

A project manager is interested in crashing a project with variable activity times. Which of the following tools should he/she employ?

Accepted Answer

A)  PERT 
B)  CPM 
C)  Gantt Chart 
D)  either PERT or CPM 
E)  PERT, CPM, or a Gantt chart are fine. 
A)  PERT 
B)  CPM 
C)  Gantt Chart 
D)  either PERT or CPM 
E)  PERT, CPM, or a Gantt chart are fine.

Question 16

The following activities are part of a project to be scheduled using the critical path method.
   Calculate
(a) The critical path.
(b) The slack available at any non-critical points.
(c) The minimum project duration.

Accepted Answer

@#IMG-DLM& (a) ACDEG
(b) B has a slack o

Question 17

A contractor's project being analyzed by PERT has an estimated time for the critical path of 120 days. The sum of all activity variances is 81; the sum of variances along the critical path is 64. What is the probability that the project will take 130 or more days to complete?

Accepted Answer

A)  0.10565 
B)  0.13350 
C)  0.85120 
D)  0.89435 
E)  1.29 
A)  0.10565 
B)  0.13350 
C)  0.85120 
D)  0.89435 
E)  1.29

Question 18

The time an activity will take assuming very unfavorable conditions is:

Accepted Answer

A)  the optimistic time. 
B)  the pessimistic time. 
C)  the activity variance. 
D)  the minimum time. 
E)  exactly twice as long as the expected time. 
A)  the optimistic time. 
B)  the pessimistic time. 
C)  the activity variance. 
D)  the minimum time. 
E)  exactly twice as long as the expected time.

Question 19

Describe the differences between a Gantt chart and a PERT/CPM network.

Accepted Answer

The differences between a Gant

Question 20

A code of ethics especially for project managers:

Accepted Answer

A)  has been established by the Project Management Institute. 
B)  has been formulated by the Federal government. 
C)  has been formulated by the World Trade Organization. 
D)  is inappropriate, since everyone should use the same guidance on ethical issues. 
E)  does not exist at this time. 
A)  has been established by the Project Management Institute. 
B)  has been formulated by the Federal government. 
C)  has been formulated by the World Trade Organization. 
D)  is inappropriate, since everyone should use the same guidance on ethical issues. 
E)  does not exist at this time.

Exam 3: Project Management

Identify several advantages of using PERT (and CPM).

Draw the AOA and AON networks for the following project and calculate the minimum project duration.

Which of these statements regarding time-cost tradeoffs in CPM networks is TRUE?

A simple CPM network has three activities, A, B, and C. A is an immediate predecessor of B and of C. B is an immediate predecessor of C. The activity durations are A=4, B=3, C=5.

Which of the following statements regarding CPM is TRUE?

Identify, in order, the six steps basic to both PERT and CPM.

Which of the following statements regarding time-cost tradeoffs in CPM networks is FALSE?

Which of the following statements about Bechtel is TRUE?

A(n) ________ is an organization formed to ensure that programs (projects) receive the proper management and attention.

Consider the network described in the table below. (a) Calculate the expected duration of each activity. (b) Calculate the expected duration and variance of the critical path. (c) Calculate the probability that the project will be completed in more than 28 weeks time units.

What is the objective of critical path analysis?

A combination of effective Gantt chart use and other tactics allowed Delta to cut the average time for a plane layover by what % of the original 60-minute duration?

A project manager is interested in crashing a project with variable activity times. Which of the following tools should he/she employ?

The following activities are part of a project to be scheduled using the critical path method. Calculate (a) The critical path. (b) The slack available at any non-critical points. (c) The minimum project duration.

A contractor's project being analyzed by PERT has an estimated time for the critical path of 120 days. The sum of all activity variances is 81; the sum of variances along the critical path is 64. What is the probability that the project will take 130 or more days to complete?

The time an activity will take assuming very unfavorable conditions is:

Describe the differences between a Gantt chart and a PERT/CPM network.

A code of ethics especially for project managers:

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