Question 1

All activities on a critical path have zero slack time.

Accepted Answer

A) True 
 B)False

Question 2

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 3

From this schedule of activities,draw the PERT/CPM network.
 $$\begin{array} { c c } 
\text { Activity } & \text { Immediate } \
\text { Predecessor } \
\hline \text { A } & \cdots \
\text { B } & \text { A } \
\text { C } & \text { B } \
\text { D } & \text { B } \
\text { E } & \text { A } \
\text { F } & \text { C, D } \
\text { G } & \text { E, F }
\end{array}$$

Accepted Answer

The answer of From this schedule of activities,draw the PERT/CPM...

Question 4

In CPM,for activities with more than one immediate predecessor activity,which of the following is used to compute its earliest finish (EF)time​

Accepted Answer

A) ​largest EF among the immediate predecessors 
B) ​smallest LF among the immediate predecessors 
C) ​smallest EF among the immediate predecessors 
D) ​average of EFs among the immediate predecessors 
A) ​largest EF among the immediate predecessors 
B) ​smallest LF among the immediate predecessors 
C) ​smallest EF among the immediate predecessors 
D) ​average of EFs among the immediate predecessors

Question 5

​Precedence relationships among activities is critical in CPM analysis but not in PERT.

Accepted Answer

A) True 
 B)False

Question 6

The variance in the project completion time is the sum of the variances of all activities in the project.

Accepted Answer

A) True 
 B)False

Question 7

The critical path for this network is A - E - F and the project completion time is 22 weeks.
   ​
 $$\begin{array} { c c c r r } 
\text { Activity } & \begin{array} { c } 
\text { Normal } \
\text { Time }
\end{array} & \begin{array} { c } 
\text { Crash } \
\text { Time }
\end{array} & \begin{array} { c } 
\text { Normal } \
\text { Cost }
\end{array} & \multicolumn{1}{c} { \begin{array} { c } 
\text { Crash } \
\text { Cost }
\end{array} } \
\hline \text { A } & 12 & 8 & 8,000 & 12,000 \
\text { B } & 14 & 10 & 5,000 & 7,500 \
\text { C } & 8 & 8 & 10,000 & 10,000 \
\text { D } & 5 & 3 & 6,000 & 8,000 \
\text { E } & 4 & 3 & 5,000 & 7,000 \
\text { F } & 6 & 5 & 9,000 & 12,000 \
\text { G } & 10 & 8 & 5,000 & 8,000
\end{array}$$ If a deadline of 17 weeks is imposed,give the linear programming model for the crashing decision.

Accepted Answer

Let E_i = the earliest finish time for act

Question 8

A critical activity is one that​

Accepted Answer

A) ​is preventing another activity from being started 
B) ​has no room for schedule slippage 
C) ​must be started immediately 
D) ​represents a milestone event 
A) ​is preventing another activity from being started 
B) ​has no room for schedule slippage 
C) ​must be started immediately 
D) ​represents a milestone event

Question 9

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.Activity times are in weeks.
   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

The probability is less than 50% because

Question 10

The earliest start time rule

Accepted Answer

A) compares the starting times of all activities for successors of an activity. 
B) compares the finish times for all immediate predecessors of an activity. 
C) determines when the project can begin. 
D) determines when the project must begin. 
A) compares the starting times of all activities for successors of an activity. 
B) compares the finish times for all immediate predecessors of an activity. 
C) determines when the project can begin. 
D) determines when the project must begin.

Question 11

​A critical activity is

Accepted Answer

A) ​an activity that consumes no time but shows precedence between events. 
B) ​a milestone accomplishment within the project. 
C) ​an activity with zero slack. 
D) ​the beginning of an event. 
A) ​an activity that consumes no time but shows precedence between events. 
B) ​a milestone accomplishment within the project. 
C) ​an activity with zero slack. 
D) ​the beginning of an event.

Question 12

PERT and CPM are applicable only when there is no dependence among activities.

Accepted Answer

A) True 
 B)False

Question 13

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 14

From this PERT/CPM network,determine the list of activities and their predecessors.
​

Accepted Answer

​
 \[\begin{array} { c c } 
\text { Acti

Question 15

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 16

Constraints in the LP models for crashing decisions are required to compare the activity's earliest finish time with the earliest finish time of each predecessor.

Accepted Answer

A) True 
 B)False

Question 17

​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 18

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

Accepted Answer

A) True 
 B)False

All activities on a critical path have zero slack 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.

From this schedule of activities,draw the PERT/CPM network. Activity Immediate Predecessor A \@cdots B A C B D B E A F C, D G E, F

In CPM,for activities with more than one immediate predecessor activity,which of the following is used to compute its earliest finish (EF)time

Precedence relationships among activities is critical in CPM analysis but not in PERT.

The variance in the project completion time is the sum of the variances of all activities in the project.

A critical activity is one that

The earliest start time rule

A critical activity is

PERT and CPM are applicable only when there is no dependence among activities.

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

From this PERT/CPM network,determine the list of activities and their predecessors.

Constraints in the LP models for crashing decisions are required to compare the activity's earliest finish time with the earliest finish time of each predecessor.

The main difference between CPM and PERT is

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

Introduction

Introduction to Probability

Probability Distributions

Decision Analysis

Utility Game Theory

Time Series Analysis Forecasting

Intro to Linear Programming

LP Sensitivity Analysis

LP Applications

Distribution Network Models

Integer Linear Programming

Advanced Optimization Applications

Inventory Models

Waiting Line Models

Simulation

Markov Processes

Filters

Exam 13: Project Scheduling

All activities on a critical path have zero slack 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.

From this schedule of activities,draw the PERT/CPM network. Activity Immediate Predecessor A \@cdots B A C B D B E A F C, D G E, F

In CPM,for activities with more than one immediate predecessor activity,which of the following is used to compute its earliest finish (EF)time​

​Precedence relationships among activities is critical in CPM analysis but not in PERT.

The variance in the project completion time is the sum of the variances of all activities in the project.

A critical activity is one that​

The earliest start time rule

​A critical activity is

PERT and CPM are applicable only when there is no dependence among activities.

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

From this PERT/CPM network,determine the list of activities and their predecessors. ​

Constraints in the LP models for crashing decisions are required to compare the activity's earliest finish time with the earliest finish time of each predecessor.

​The main difference between CPM and PERT is

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

Introduction

Introduction to Probability

Probability Distributions

Decision Analysis

Utility Game Theory

Time Series Analysis Forecasting

Intro to Linear Programming

LP Sensitivity Analysis

LP Applications

Distribution Network Models

Integer Linear Programming

Advanced Optimization Applications

Inventory Models

Waiting Line Models

Simulation

Markov Processes

Filters

In CPM,for activities with more than one immediate predecessor activity,which of the following is used to compute its earliest finish (EF)time

Precedence relationships among activities is critical in CPM analysis but not in PERT.

A critical activity is one that

A critical activity is

From this PERT/CPM network,determine the list of activities and their predecessors.

The main difference between CPM and PERT is