Question 1

PERT (Program Evaluation and Review Technique) generally treats activity completion times as probabilistic and:

Accepted Answer

A) is used to construct a Gantt chart. 
B) is used to determine the probability that a project will be complete within a given time frame. 
C) can be used to determine the exact completion time of an activity. 
D) can be used to determine the exact completion time of a project. 
A) is used to construct a Gantt chart. 
B) is used to determine the probability that a project will be complete within a given time frame. 
C) can be used to determine the exact completion time of an activity. 
D) can be used to determine the exact completion time of a project. B

Question 2

Which of the following is true?

Accepted Answer

A) PERT gives a better solution than the expected value criterion. 
B) To use the expected value criterion, we must know every possible outcome. 
C) The expected value criterion determines the optimal decision by choosing the best expected payoff. 
D) Adding resources will decrease the project time to completion. 
A) PERT gives a better solution than the expected value criterion. 
B) To use the expected value criterion, we must know every possible outcome. 
C) The expected value criterion determines the optimal decision by choosing the best expected payoff. 
D) Adding resources will decrease the project time to completion. C

Question 3

When attempting to use PERT methodology, how do you estimate the mean completion time and standard deviation when, for a given activity, the time estimates a, b, and m (pessimistic, optimistic, and most likely) are all identical? What implications does this have if several activities have this property?

Accepted Answer

(Then the estimated mean completion time = m = a = b, and the standard deviation is zero.
For this task, PERT becomes CPM.If an insufficient number of activities have a < m < b with finite values for a and b, the normality assumption for the probability distribution of overall project completion times becomes questionable.Incidentally, m = a = b is an indication that the person estimating task time has lost patience with the management science analyst and does not wish to participate further.)

Question 4

The critical path:

Accepted Answer

A) is the shortest path through the network. 
B) is necessarily unique. 
C) Is defined by activities with zero slack. 
D) Shows, by elimination, which activities management can safely ignore. 
A) is the shortest path through the network. 
B) is necessarily unique. 
C) Is defined by activities with zero slack. 
D) Shows, by elimination, which activities management can safely ignore.

Question 5

For an activity, an engineer estimatesa (optimistic time) = 4
b (pessimistic time) = 11
m (most likely time) = 6
What is the mean for this activity? The variance?

Accepted Answer

( @#LAT-DLM& = (a + b + 4m)/6 = 6.5
@#LAT-DLM&<su

Question 6

Consider the following information for the activities comprising a small construction project which is scheduled to complete in 26 days.(Costs are in $1000's.)
$\begin{array}{cccccc}
&&\text { Normal }&\text { Schedule}&\text { Crash}&\text { Schedule }\
\text { Activity } & \text { Slack } & \text { Time } & \text { Cost } & \text { Time } & \text { Cost } \
\text { M } & 0 & 7 & 10 & 4 & 19 \
\text { II } & 2 & 5 & 6 & 5 & 6 \
\text { O } & 0 & 4 & 7 & 2 & 12 \
\text { P } & 0 & 5 & 9 & 3 & 13 \
\text { Q } & 2 & 2 & 5 & 1 & 6 \
\text { R } & 0 & 4 & 9 & 4 & 9 \
\text { S } & 0 & 6 & 12 & 5 & 15
\end{array}$ A.If the project must be completed in 25 days, which activity should be accelerated? Why?
B.Will the critical path be altered?
C.What is the total estimated cost of the project on the accelerated 25 day schedule?

Accepted Answer

A.
(Activity crash costs per day: M = 3.

Question 7

In using PERT/CPM, why does management need to pay any attention at all to non-critical path activities?

Accepted Answer

(PERT/CPM necessarily deals with time an

Question 8

Overall project completion time will not be affected if an activity possessing slack time is started at any time between its earliest and latest start time.

Accepted Answer

A) True 
 B)False

Question 9

Discuss the assumptions required for determining the probability that a project will be completed within a certain time period by using a normal distribution of the activity time along the critical path determined by mean completion times of the critical activities.Do you think they are realistic for most projects?

Accepted Answer

(There are three assumptions: (1) The ac

Question 10

Using PERT, we have determined the mean completion time for each activity ($\mu$j) and the standard deviation for each activity completion time ($\sigma$j).How do we use these data to determine the overall project completion time?

Accepted Answer

(Determine the critical path using @#LAT-DLM&<sub>

Question 11

Typically, the first step in project scheduling is the construction of a:

Accepted Answer

A) Gantt chart. 
B) Critical path chart. 
C) PERT chart. 
D) set of precedence relationships between the activities. 
A) Gantt chart. 
B) Critical path chart. 
C) PERT chart. 
D) set of precedence relationships between the activities.

Question 12

Using the Critical Path Method, the normal time to complete activity D is 10 weeks, and its normal cost is $500.Under maximum crashing, activity D can be completed is 4 weeks for $2,300.Therefore, if $1,100 is spent on activity D, its completion time will be 6 weeks.

Accepted Answer

A) True 
 B)False

Question 13

The earliest start time (ES) of an activity:

Accepted Answer

A) equals its earliest finish time (EF) minus task time. 
B) equals the minimum earliest finish time (EF) of all immediate predecessors. 
C) equals the latest start time (LS) for non-critical activities. 
D) may not be the same for two or more activities. 
A) equals its earliest finish time (EF) minus task time. 
B) equals the minimum earliest finish time (EF) of all immediate predecessors. 
C) equals the latest start time (LS) for non-critical activities. 
D) may not be the same for two or more activities.

Question 14

Activity C is an immediate predecessor of activity G.Both activities have 4 hours of slack time.If both activities are delayed 3 hours, and these are the only delays, the overall effect of these delays is to delay the minimum project completion time by:

Accepted Answer

A) 0 hours. 
B) 2 hours. 
C) 6 hours. 
D) The overall delay cannot be determined with only this information. 
A) 0 hours. 
B) 2 hours. 
C) 6 hours. 
D) The overall delay cannot be determined with only this information.

Question 15

In the critical path method (CPM), crashing does not:

Accepted Answer

A) deal with accelerating a project's overall completion time. 
B) assume that every activity completion time can be crashed. 
C) require two time estimates for each activity's duration time. 
D) take into account the possibility of creating multiple critical paths. 
A) deal with accelerating a project's overall completion time. 
B) assume that every activity completion time can be crashed. 
C) require two time estimates for each activity's duration time. 
D) take into account the possibility of creating multiple critical paths.

Question 16

In PERT, the acceptance of a Beta distribution for activity completion times and the presence of a sufficient number of activities, lead to the assumption of a normal distribution of possible completion times for the overall project.

Accepted Answer

A) True 
 B)False

Question 17

For the data in problem 6,A.Using the normal times, prepare a chart giving the earliest and latest start and finish times and slack for each activity.
B.What is the critical path and the project completion time using normal times?
C.What is the effect of a 2 week delay to activity B? What is the effect of a 2 week delay to activity B combined with a 2 week delay to activity D?

Accepted Answer

A.(
 )  
B.(A - E - F; 16 week

Question 18

Which of the following is not a fundamental, inherent weakness in the probabilistic approach to PERT?

Accepted Answer

A) One may have difficulty in obtaining three reliable time estimates for each activity. 
B) There is the possibility of large variances for non-critical activities. 
C) The assumption that activity times are independent of each other. 
D) The assumption that possible overall project completion times are Beta-distributed. 
A) One may have difficulty in obtaining three reliable time estimates for each activity. 
B) There is the possibility of large variances for non-critical activities. 
C) The assumption that activity times are independent of each other. 
D) The assumption that possible overall project completion times are Beta-distributed.

Question 19

Activity A is critical.Activity B has a slack time of 5 days.What is the impact of a 7 day delay in either A or B?

Accepted Answer

(A delay for activity A delays

Question 20

A "forward pass" in network analysis of a project, determines:

Accepted Answer

A) earliest times. 
B) latest times. 
C) slack times. 
D) most likely times. 
A) earliest times. 
B) latest times. 
C) slack times. 
D) most likely times.

PERT (Program Evaluation and Review Technique) generally treats activity completion times as probabilistic and:

Which of the following is true?

The critical path:

For an activity, an engineer estimatesa (optimistic time) = 4 b (pessimistic time) = 11 m (most likely time) = 6 What is the mean for this activity? The variance?

In using PERT/CPM, why does management need to pay any attention at all to non-critical path activities?

Overall project completion time will not be affected if an activity possessing slack time is started at any time between its earliest and latest start time.

Using PERT, we have determined the mean completion time for each activity ( $\mu$ _j) and the standard deviation for each activity completion time ( $\sigma$ _j).How do we use these data to determine the overall project completion time?

Typically, the first step in project scheduling is the construction of a:

Using the Critical Path Method, the normal time to complete activity D is 10 weeks, and its normal cost is $500.Under maximum crashing, activity D can be completed is 4 weeks for $2,300.Therefore, if $1,100 is spent on activity D, its completion time will be 6 weeks.

The earliest start time (ES) of an activity:

Activity C is an immediate predecessor of activity G.Both activities have 4 hours of slack time.If both activities are delayed 3 hours, and these are the only delays, the overall effect of these delays is to delay the minimum project completion time by:

In the critical path method (CPM), crashing does not:

In PERT, the acceptance of a Beta distribution for activity completion times and the presence of a sufficient number of activities, lead to the assumption of a normal distribution of possible completion times for the overall project.

Which of the following is not a fundamental, inherent weakness in the probabilistic approach to PERT?

Activity A is critical.Activity B has a slack time of 5 days.What is the impact of a 7 day delay in either A or B?

A "forward pass" in network analysis of a project, determines:

Introduction to Management Science Models

Introduction to Management Science Models

Applications of Linear and Integer Programming Models

Network Models

Decision Models

Forecasting

Inventory Models

Queuing Models

Simulation Models

Quality Management Models

Markov Process Models

Nonlinear Models:dynamic, Goal, and Nonlinear Programming

Filters

Exam 5: Project Scheduling Models

PERT (Program Evaluation and Review Technique) generally treats activity completion times as probabilistic and:

Which of the following is true?

The critical path:

For an activity, an engineer estimatesa (optimistic time) = 4 b (pessimistic time) = 11 m (most likely time) = 6 What is the mean for this activity? The variance?

In using PERT/CPM, why does management need to pay any attention at all to non-critical path activities?

Overall project completion time will not be affected if an activity possessing slack time is started at any time between its earliest and latest start time.

Using PERT, we have determined the mean completion time for each activity ( μ\muμ j) and the standard deviation for each activity completion time ( σ\sigmaσ j).How do we use these data to determine the overall project completion time?

Typically, the first step in project scheduling is the construction of a:

Using the Critical Path Method, the normal time to complete activity D is 10 weeks, and its normal cost is $500.Under maximum crashing, activity D can be completed is 4 weeks for $2,300.Therefore, if $1,100 is spent on activity D, its completion time will be 6 weeks.

The earliest start time (ES) of an activity:

Activity C is an immediate predecessor of activity G.Both activities have 4 hours of slack time.If both activities are delayed 3 hours, and these are the only delays, the overall effect of these delays is to delay the minimum project completion time by:

In the critical path method (CPM), crashing does not:

In PERT, the acceptance of a Beta distribution for activity completion times and the presence of a sufficient number of activities, lead to the assumption of a normal distribution of possible completion times for the overall project.

Which of the following is not a fundamental, inherent weakness in the probabilistic approach to PERT?

Activity A is critical.Activity B has a slack time of 5 days.What is the impact of a 7 day delay in either A or B?

A "forward pass" in network analysis of a project, determines:

Introduction to Management Science Models

Introduction to Management Science Models

Applications of Linear and Integer Programming Models

Network Models

Decision Models

Forecasting

Inventory Models

Queuing Models

Simulation Models

Quality Management Models

Markov Process Models

Nonlinear Models:dynamic, Goal, and Nonlinear Programming

Filters

Using PERT, we have determined the mean completion time for each activity ( $\mu$ _j) and the standard deviation for each activity completion time ( $\sigma$ _j).How do we use these data to determine the overall project completion time?