Question 1

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. C

Question 2

The main difference between CPM and PERT is

Accepted Answer

A) CPM and PERT use 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) CPM and PERT use 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

Question 3

Three paths of a PERT network have these mean durations and variances in weeks:
​   ​
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; P(D > 48)= 3.5% Path 2: s_t = 2.345; z = 1.706; P(D > 48)= 4.4% Path 3: s_t = 1.095; z = 1.826; P(D > 48)= 3.4% Path 2 offers the greatest risk (but only by a small margin).

Question 4

National Oil Company (NATOCO)must plan the shutdown of its Houston refinery for routine preventive maintenance.Each hour of downtime is lost production time and is very costly,so NATOCO wants the maintenance project completed in 22 hours.The PERT network below shows the precedence relationships of the activities involved in the project.The table gives the activity times and costs under normal operations and maximum crashing.   ​
NATOCO wants to know the minimum cost of completing the maintenance project within the 22-hour period.Formulate and solve a linear program that will yield this information.​   ​

Accepted Answer

​ m = Normal time - Time under maximum c

Question 5

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 these are 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 these are correct.

Question 6

Joe King has ambitions to be mayor of Williston,North Dakota.Joe has determined the breakdown of the steps to the nomination and has estimated normal and crash costs and times for the campaign as follows (times are in weeks).   ​   ​
Joe is not a wealthy man and would like to organize a 16-week campaign at minimum cost.Write and solve a linear program to accomplish this task.

Accepted Answer

Let X_i = earliest fin

Question 7

Shortening activity times,which is usually accomplished by adding resources to the project,is called crashing.

Accepted Answer

A) True 
 B)False

Question 8

A project has the following activities,durations,costs,and precedence relationships:
​   ​
Develop a time-cost trade-off analysis.Detail the steps that you would use to accelerate or crash the project to its minimum duration at the lowest cost.Determine each step's cost and the duration of the project.​

Accepted Answer

​ ​ @#IMG-DLM& ​ @#IMG-DLM& ​ Project is

Question 9

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 10

We identify the critical path of a project as

Accepted Answer

A) any path that goes from the starting node to the completion node. 
B) the combined time of all paths of the project. 
C) the shortest path through the project. 
D) the longest path through the project. 
A) any path that goes from the starting node to the completion node. 
B) the combined time of all paths of the project. 
C) the shortest path through the project. 
D) the longest path through the project.

Question 11

A critical activity can be part of a noncritical path.

Accepted Answer

A) True 
 B)False

Question 12

The critical path for this network is A - E - F,and the project completion time is 22 weeks.     ​
If a deadline of 17 weeks is imposed,give the linear programming model for the crashing decision.

Accepted Answer

Let E_i = earliest fin

Question 13

When activity times are uncertain,an activity's most likely time is the same as its expected time.

Accepted Answer

A) True 
 B)False

Question 14

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

Accepted Answer

A) True 
 B)False

Question 15

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 16

It is normal for activities on the critical path to be delayed without delaying the entire project.

Accepted Answer

A) True 
 B)False

Question 17

A path through a project network must reach every node.

Accepted Answer

A) True 
 B)False

Question 18

Use the following network of related activities with their duration times (weeks)to complete a row for each activity under the column headings below.

Accepted Answer

​ @#IMG-DLM& ​ CRITICAL PATH:

Question 19

PERT and CPM

Accepted Answer

A) are most valuable when a small number of activities must be scheduled. 
B) have different features and are not applied to the same situation. 
C) do not require a chronological relationship among activities. 
D) have been combined to develop a procedure that uses the best of each. 
A) are most valuable when a small number of activities must be scheduled. 
B) have different features and are not applied to the same situation. 
C) do not require a chronological relationship among activities. 
D) have been combined to develop a procedure that uses the best of each.

Question 20

In PERT,the activity duration time is equal to the

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.

Activities with zero slack

The main difference between CPM and PERT is

Three paths of a PERT network have these mean durations and variances in weeks: Which path offers the greatest risk of overrunning a contract deadline of 48 weeks?

Activities following a node

Shortening activity times,which is usually accomplished by adding resources to the project,is called crashing.

A project has the following activities,durations,costs,and precedence relationships: Develop a time-cost trade-off analysis.Detail the steps that you would use to accelerate or crash the project to its minimum duration at the lowest cost.Determine each step's cost and the duration of the project.

A critical activity is

We identify the critical path of a project as

A critical activity can be part of a noncritical path.

The critical path for this network is A - E - F,and the project completion time is 22 weeks. If a deadline of 17 weeks is imposed,give the linear programming model for the crashing decision.

When activity times are uncertain,an activity's most likely time is the same as its expected time.

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

The earliest start time rule

It is normal for activities on the critical path to be delayed without delaying the entire project.

A path through a project network must reach every node.

Use the following network of related activities with their duration times (weeks)to complete a row for each activity under the column headings below.

PERT and CPM

In PERT,the activity duration time is equal to the

Introduction

An Introduction to Linear Programming

Linear Programming: Sensitivity Analysis and Interpretation of Solution

Linear Programming Applications in Marketing, finance, and OM

Advanced Linear Programming Applications

Distribution and Network Models

Integer Linear Programming

Nonlinear Optimization Models

Inventory Models

Waiting Line Models

Simulation

Decision Analysis

Multicriteria Decisions

Time Series Analysis and Forecasting

Markov Processes

Linear Programming: Simplex Method

Simplex-Based Sensitivity Analysis and Duality

Solution Procedures for Transportation and Assignment Problems

Minimal Spanning Tree

Dynamic Programming

Filters

Exam 9: Project Scheduling: Pertcpm

Activities with zero slack

The main difference between CPM and PERT is

Three paths of a PERT network have these mean durations and variances in weeks: ​ ​ Which path offers the greatest risk of overrunning a contract deadline of 48 weeks?

Activities following a node

Shortening activity times,which is usually accomplished by adding resources to the project,is called crashing.

A critical activity is

We identify the critical path of a project as

A critical activity can be part of a noncritical path.

The critical path for this network is A - E - F,and the project completion time is 22 weeks. ​ If a deadline of 17 weeks is imposed,give the linear programming model for the crashing decision.

When activity times are uncertain,an activity's most likely time is the same as its expected time.

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

The earliest start time rule

It is normal for activities on the critical path to be delayed without delaying the entire project.

A path through a project network must reach every node.

Use the following network of related activities with their duration times (weeks)to complete a row for each activity under the column headings below.

PERT and CPM

In PERT,the activity duration time is equal to the

Introduction

An Introduction to Linear Programming

Linear Programming: Sensitivity Analysis and Interpretation of Solution

Linear Programming Applications in Marketing, finance, and OM

Advanced Linear Programming Applications

Distribution and Network Models

Integer Linear Programming

Nonlinear Optimization Models

Inventory Models

Waiting Line Models

Simulation

Decision Analysis

Multicriteria Decisions

Time Series Analysis and Forecasting

Markov Processes

Linear Programming: Simplex Method

Simplex-Based Sensitivity Analysis and Duality

Solution Procedures for Transportation and Assignment Problems

Minimal Spanning Tree

Dynamic Programming

Filters

Three paths of a PERT network have these mean durations and variances in weeks: Which path offers the greatest risk of overrunning a contract deadline of 48 weeks?

The critical path for this network is A - E - F,and the project completion time is 22 weeks. If a deadline of 17 weeks is imposed,give the linear programming model for the crashing decision.