Question 1

In PERT,the activity duration time is equal to:

Accepted Answer

A) pessimistic time 
B) optimistic time 
C) most likely time 
D) mean duration 
A) pessimistic time 
B) optimistic time 
C) most likely time 
D) mean duration

Question 2

Suppose that,after analyzing a PERT/CPM ntwork,the project manager finds that the project completion time is unacceptable.What are the manager's options?

Accepted Answer

The project manager has several options

Question 3

Activities K,M and S immediately follow activity H,and their latest start times are 14,18,and 11.The latest finish time for activity H

Accepted Answer

A) is 11. 
B) is 14. 
C) is 18. 
D) cannot be determined. 
A) is 11. 
B) is 14. 
C) is 18. 
D) cannot be determined.

Question 4

Activities G,P,and R are the immediate predecessors for activity W.If the earliest finish times for the three are 12,15,and 10,then the earliest start time for W

Accepted Answer

A) is 10. 
B) is 12. 
C) is 15. 
D) cannot be determined. 
A) is 10. 
B) is 12. 
C) is 15. 
D) cannot be determined.

Question 5

Three paths of a PERT network have these mean durations and variances in weeks: $$\begin{array} { c c c } 
\hline \text { Path } & \begin{array} { c } 
\text { Mean } \
\text { Duration }
\end{array} & \text { Variance } \
\hline 1 & 45 & 2.75 \
2 & 44 & 5.50 \
3 & 46 & 1.20 \
\hline \hline
\end{array}$$ Which path offers the greatest risk of overrunning a contract deadline of 48 weeks?

Accepted Answer

Path 1: s_t = 1.658; z = 1.809;

Question 6

The length of time an activity can be delayed without affecting the project completion time is the slack.

Accepted Answer

A) True 
 B)False

Question 7

For the project represented below,determine the earliest and latest start and finish times for each activity as well as the expected overall completion time.   $$\begin{array} { c c c c c c c } 
\text { Activity } & \text { Duration } & \text { ES } & \text { EF } & \text { LS } & \text { LF } & \text { Slack } \
\hline \text { A } & 4 & & & & & \
\text { B } & 3 & & & & & \
\text { C } & 4 & & & & & \
\text { D } & 2 & & & & & \
\text { E } & 5 & & & & & \
\text { F } & 2 & & & & & \
\text { G } & 5 & & & & & \
\text { H } & 6 & & & &
\end{array}$$

Accepted Answer

[Activity,ES,EF,LS,LF,Slack]
[

Question 8

The earliest finish time for the final activity is the project duration.

Accepted Answer

A) True 
 B)False

Question 9

Activities following a node

Accepted Answer

A) can begin as soon as any activity preceding the node has been completed. 
B) have an earliest start time equal to the largest of the earliest finish times for all activities entering the node. 
C) have a latest start time equal to the largest of the earliest finish times for all activities entering the node. 
D) None of the alternatives is correct. 
A) can begin as soon as any activity preceding the node has been completed. 
B) have an earliest start time equal to the largest of the earliest finish times for all activities entering the node. 
C) have a latest start time equal to the largest of the earliest finish times for all activities entering the node. 
D) None of the alternatives is correct.

Question 10

Explain how and why all successor activities must be considered when finding the latest finish time.

Accepted Answer

When finding the latest finish time for

Question 11

When activity times are uncertain,total project time is normally distributed with mean equal to the sum of the means of all of the critical activities.

Accepted Answer

A) True 
 B)False

Question 12

A path through a project network must reach every node.

Accepted Answer

A) True 
 B)False

Question 13

A project network is shown below.Use a forward and a backward pass to determine the critical path,and then fill out the table below.     Now assume that the times listed are only the expected times instead of being fixed times.Is the probability of being finished in fewer than 25 weeks more or less than 50%?

Accepted Answer

@#IMG-DLM& The probability is

Question 14

In deciding which activities to crash,one must

Accepted Answer

A) crash all critical activities. 
B) crash largest-duration activities. 
C) crash lowest-cost activities. 
D) crash activities on the critical path(s) only. 
A) crash all critical activities. 
B) crash largest-duration activities. 
C) crash lowest-cost activities. 
D) crash activities on the critical path(s) only.

Question 15

When activity times are uncertain,

Accepted Answer

A) assume they are normally distributed. 
B) calculate the expected time, using (a + 4m + b)/6. 
C) use the most likely time. 
D) calculate the expected time, using (a + m + b)/3. 
A) assume they are normally distributed. 
B) calculate the expected time, using (a + 4m + b)/6. 
C) use the most likely time. 
D) calculate the expected time, using (a + m + b)/3.

Question 16

For an activity with more than one immediate successor activity,its latest-finish time is equal to the

Accepted Answer

A) largest latest-finish time among its immediate successors. 
B) smallest latest-finish time among its immediate successors. 
C) largest latest-start time among its immediate successors. 
D) smallest latest-start time among its immediate successors. 
A) largest latest-finish time among its immediate successors. 
B) smallest latest-finish time among its immediate successors. 
C) largest latest-start time among its immediate successors. 
D) smallest latest-start time among its immediate successors.

Question 17

Consider a project that has been modeled as follows: $$\begin{array} { c c c } 
\text { Activity } & \text { Immediate Predecessors } & \text { Duration (hr) } \
\hline \text { A } & \cdots & 7 \
\text { B } & \cdots & 10 \
\text { C } & \text { A } & 4 \
\text { D } & \text { A } & 30 \
\text { E } & \text { A } & 7 \
\text { F } & \text { B,C } & 12 \
\text { G } & \text { B,C } & 15 \
\text { H } & \text { E,F } & 11 \
\text { I } & \text { E,F } & 25 \
\text { J } & \text { E,F } & 6 \
\text { K } & \text { D, H } & 21 \
\text { L } & \text { G,J } & 25
\end{array}$$ 
a.Draw the PERT/CPM network for this project and determine project's expected completion time and its critical path.
b.Can activities E and G be performed simultaneously without delaying the minimum project completion time?
c.Can one person perform A, G, and I without delaying the project?
d.By how much can activities G and L be delayed without delaying the entire project?
e.How much would the project be delayed if activity G was delayed by 7 hours and activity L was delayed by 4 hours? Explain.

Accepted Answer

a. @#IMG-DLM& Expected Completion Time =

Question 18

A project network is shown below.Use a forward and a backward pass to determine the critical path,and then fill out the table below.     Now assume that the times listed are only the expected times instead of being fixed times.Is the probability of being finished in more than 28 weeks more or less than 50%?

Accepted Answer

@#IMG-DLM& The probability is

Question 19

The main difference between CPM and PERT is:

Accepted Answer

A) the use of different activity time estimates 
B) PERT analysis is less expensive to conduct 
C) PERT lends itself to computerization while CPM networks must be constructed manually 
D) CPM integrates time and cost performance while PERT is based solely on time performance 
A) the use of different activity time estimates 
B) PERT analysis is less expensive to conduct 
C) PERT lends itself to computerization while CPM networks must be constructed manually 
D) CPM integrates time and cost performance while PERT is based solely on time performance

Question 20

Activities with zero slack

Accepted Answer

A) can be delayed. 
B) must be completed first. 
C) lie on a critical path. 
D) have no predecessors. 
A) can be delayed. 
B) must be completed first. 
C) lie on a critical path. 
D) have no predecessors.

In PERT,the activity duration time is equal to:

Suppose that,after analyzing a PERT/CPM ntwork,the project manager finds that the project completion time is unacceptable.What are the manager's options?

Activities K,M and S immediately follow activity H,and their latest start times are 14,18,and 11.The latest finish time for activity H

Activities G,P,and R are the immediate predecessors for activity W.If the earliest finish times for the three are 12,15,and 10,then the earliest start time for W

Three paths of a PERT network have these mean durations and variances in weeks: Path Mean Duration Variance 1 45 2.75 2 44 5.50 3 46 1.20 Which path offers the greatest risk of overrunning a contract deadline of 48 weeks?

The length of time an activity can be delayed without affecting the project completion time is the slack.

The earliest finish time for the final activity is the project duration.

Activities following a node

Explain how and why all successor activities must be considered when finding the latest finish time.

When activity times are uncertain,total project time is normally distributed with mean equal to the sum of the means of all of the critical activities.

A path through a project network must reach every node.

In deciding which activities to crash,one must

When activity times are uncertain,

For an activity with more than one immediate successor activity,its latest-finish time is equal to the

The main difference between CPM and PERT is:

Activities with zero slack

Introduction

Introduction to Probability

Probability Distributions

Decision Analysis

Utility and Game Theory

Times Series Analysis and Forecasting

Introduction to Linear Programming

Linear Programming: Sensitivity Analysis and Interpretation of Solution

Linear Programming Applications in Marketing, Finance, and Operations Management

Distribution and Network Models

Integer Linear Programming

Advanced Optimization Applications

Inventory Models

Waiting Line Models

Simulation

Markov Processes

Filters

Exam 13: Project Scheduling: Pertcpm

In PERT,the activity duration time is equal to:

Suppose that,after analyzing a PERT/CPM ntwork,the project manager finds that the project completion time is unacceptable.What are the manager's options?

Activities K,M and S immediately follow activity H,and their latest start times are 14,18,and 11.The latest finish time for activity H

Activities G,P,and R are the immediate predecessors for activity W.If the earliest finish times for the three are 12,15,and 10,then the earliest start time for W

Three paths of a PERT network have these mean durations and variances in weeks: Path Mean Duration Variance 1 45 2.75 2 44 5.50 3 46 1.20 Which path offers the greatest risk of overrunning a contract deadline of 48 weeks?

The length of time an activity can be delayed without affecting the project completion time is the slack.

For the project represented below,determine the earliest and latest start and finish times for each activity as well as the expected overall completion time. Activity Duration ES EF LS LF Slack A 4 B 3 C 4 D 2 E 5 F 2 G 5 H 6

The earliest finish time for the final activity is the project duration.

Activities following a node

Explain how and why all successor activities must be considered when finding the latest finish time.

When activity times are uncertain,total project time is normally distributed with mean equal to the sum of the means of all of the critical activities.

A path through a project network must reach every node.

In deciding which activities to crash,one must

When activity times are uncertain,

For an activity with more than one immediate successor activity,its latest-finish time is equal to the

The main difference between CPM and PERT is:

Activities with zero slack

Introduction

Introduction to Probability

Probability Distributions

Decision Analysis

Utility and Game Theory

Times Series Analysis and Forecasting

Introduction to Linear Programming

Linear Programming: Sensitivity Analysis and Interpretation of Solution

Linear Programming Applications in Marketing, Finance, and Operations Management

Distribution and Network Models

Integer Linear Programming

Advanced Optimization Applications

Inventory Models

Waiting Line Models

Simulation

Markov Processes

Filters