Question 1

A simple CPM network has five activities,A,B,C,D,and E.A is an immediate predecessor of C and of D.B is also an immediate predecessor of C and of D.C and D are both immediate predecessors of E.Which of the following statements is true?
A)There are two paths in this network.
B)There are four paths in this network.
C)There are five paths in this network.
D)There are 25 paths in this network.
E)There are six paths in this network.

Accepted Answer

There are two paths to complete activity E:
1. A -> C -> E
2. B -> D -> E

Therefore, there are four paths in this network:
1. A -> C -> D -> E
2. A -> C -> E
3. B -> D -> C -> E
4. B -> D -> E

Question 2

The ________ is a project management technique using only one time factor per activity that enables managers to schedule,monitor,and control large and complex projects.

Accepted Answer

The answer of The ________ is a project management technique...

Question 3

Which of the following statements concerning CPM activities is false?
A)The early finish of an activity is the early start of that activity plus its duration.
B)The late finish is the earliest of the late start times of all successor activities.
C)The late start of an activity is its late finish less its duration.
D)The late finish of an activity is the earliest late start of all preceding activities.
E)The early start of an activity is the latest early finish of all preceding activities.

Accepted Answer

The late finish of an activity is determined by the latest of the early start times of its successor activities, not the earliest late start of all preceding activities. This statement misrepresents how the late finish time is calculated in the Critical Path Method (CPM).

Question 4

The network analysis method that allows activity times to vary is ________.

Accepted Answer

The answer of The network analysis method that allows activity...

Question 5

Activity R on a CPM network has predecessors M and N,and has successor S.R has duration 5.N's late finish is 18,while M's is 20.S's late start is 14.Which of the following is definitely true?
A)R is critical and has zero slack.
B)R has no slack but is not critical.
C)The set of times cannot all be possible.
D)N is a critical activity.
E)S is a critical activity.

Accepted Answer

The late start of S (14) minus the duration of R (5) gives a late finish for R of 9, which is inconsistent with the late finishes of M (20) and N (18), indicating a contradiction in the given times.

Question 6

Every network has at least one critical path.

Accepted Answer

A critical path is the longest path in a network, and every network will have at least one longest path, which will be the critical path.

Question 7

Which of the following statements regarding CPM is true?
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.

Accepted Answer

In CPM (Critical Path Method), the critical path is the longest path through the network, and all activities on this path have their Late Start (LS) equal to the maximum Early Finish (EF) of all immediate predecessors.

Question 8

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=8.
A)The critical path is A-B-C,duration 15.
B)The critical path is A-C,duration 12.
C)The critical path is A-B-C,duration 13.5
D)The critical path cannot be determined without knowing PERT expected activity times.
E)The network has no critical path.

Accepted Answer

The critical path is the longest path through the network, which means it has the longest duration. In this case, the longest path is A-B-C with a duration of 15. Therefore, choice A is correct. Choice B is incorrect because it only includes activities A and C, which is not the longest path. Choice C is incorrect because the duration of the critical path is actually 15, not 13.5. Choice D is incorrect because PERT expected activity times are not needed to determine the critical path in a simple CPM network. Choice E is incorrect because there is a critical path in this network.

Question 9

The ES of an activity that has only one predecessor is simply the EF of that predecessor.

Accepted Answer

This statement is true. The ES (early start) of an activity that has only one predecessor is indeed equal to the EF (early finish) of that predecessor. This is because the activity cannot start until the predecessor has finished, and so its early start cannot be earlier than the predecessor's early finish.

Question 10

The critical path can be determined by use of either the "forward pass" or the "backward pass."

Accepted Answer

The answer of The critical path can be determined by...

Question 11

Which of the following statements regarding critical paths is true?
A)The shortest of all paths through the network is the critical path.
B)Some activities on the critical path may have slack.
C)Every network has only one critical path.
D)On a specific project,there can be multiple critical paths,all with exactly the same duration.
E)The duration of the critical path is the average duration of all paths in the project network.

Accepted Answer

A project can have multiple critical paths, each with the same duration, which determines the project's minimum completion time.

Question 12

What is the basic difference between PERT and CPM?

Accepted Answer

The answer of What is the basic difference between PERT...

Question 13

Activity D on a CPM network has predecessors B and C,and has successor F.D has duration 6.B's earliest finish is 18,while C's is 20.F's late start is 26.Which of the following is definitely true?
A)B is a critical activity.
B)C is completed before B.
C)D has no slack but is not critical.
D)D is critical,and has zero slack.
E)F is critical,and has zero slack.

Accepted Answer

Since activity D has predecessors B and C, its earliest start time will be the maximum of B's earliest finish time (18) and C's earliest finish time (20), which is 20. Therefore, D's earliest start time is 20, and with a duration of 6, its earliest finish time is 26.
Since F's late start time is also 26, activity F cannot start any later than its late start time without delaying the project. This means that activity D must finish before 26, making it a critical activity.
Furthermore, since activity D has no slack (i.e., the difference between its latest start time and earliest start time is zero), it must finish on its earliest finish time, which is 26. Therefore, D is critical and has zero slack.

Question 14

Which of the following statements regarding CPM networks is true?
A)There can be multiple critical paths on the same project,all with different durations.
B)The early finish of an activity is the latest early start of all preceding activities.
C)The late start of an activity is its late finish plus its duration.
D)If a specific project has multiple critical paths,all of them will have the same duration.
E)None of the above are true.

Accepted Answer

In CPM (Critical Path Method) networks, if a project has multiple critical paths, all of them will have the same duration because they represent the longest path(s) through the project, determining the shortest time to complete the project.

Question 15

The critical path for the network activities shown below is ________ with duration ________. 
A)A-B-D;10
B)A-B-E;11
C)C-E;12
D)A-D-E;13
E)A-B-C-D-E;22

Accepted Answer

The critical path is the longest path in the network diagram and specifies the minimum amount of time required to complete the project. In this case, the critical path is A-D-E with a duration of 13, as it has the longest duration among all possible paths. Therefore, the best choice is option D.

Question 16

A simple CPM network has three activities,D,E,and F.D is an immediate predecessor of E and of F.E is an immediate predecessor of F.The activity durations are D=4,E=3,F=8.
A)The critical path is D-E-F,duration 15.
B)The critical path is D-F,duration 12.
C)Slack at D is 3 periods.
D)Slack at E is 3 periods.
E)Both A and C are true.

Accepted Answer

The answer of A simple CPM network has three activities,D,E,and...

Question 17

The difference between AON and AOA networks is that:
A)AOA networks sometimes require dummy activities.
B)nodes consume no resources or time in AOA networks.
C)both are acceptable in practice;however,Microsoft Project uses AON.
D)nodes designate activities in AON,while arrows designate activities in AOA.
E)All of the above are true.

Accepted Answer

All the statements provided are true regarding the differences between AON (Activity on Node) and AOA (Activity on Arrow) networks.

Question 18

Slack is the amount of time an activity can be delayed without delaying the entire project.

Accepted Answer

Slack is the amount of time an activity can be delayed without delaying the entire project. This statement is true.

Question 19

The ________ is the computed longest time path(s)through a network.

Accepted Answer

The answer of The ________ is the computed longest time...

Question 20

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

Accepted Answer

The answer of Identify,in order,the six steps basic to both...

Quiz 3: Project Management

A simple CPM network has five activities,A,B,C,D,and E.A is an immediate predecessor of C and of D.B is also an immediate predecessor of C and of D.C and D are both immediate predecessors of E.Which of the following statements is true?

The ________ is a project management technique using only one time factor per activity that enables managers to schedule,monitor,and control large and complex projects.

Which of the following statements concerning CPM activities is false?

The network analysis method that allows activity times to vary is ________.

Activity R on a CPM network has predecessors M and N,and has successor S.R has duration 5.N's late finish is 18,while M's is 20.S's late start is 14.Which of the following is definitely true?

Every network has at least one critical path.

Which of the following statements regarding CPM 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=8.

The ES of an activity that has only one predecessor is simply the EF of that predecessor.

The critical path can be determined by use of either the "forward pass" or the "backward pass."

Which of the following statements regarding critical paths is true?

What is the basic difference between PERT and CPM?

Activity D on a CPM network has predecessors B and C,and has successor F.D has duration 6.B's earliest finish is 18,while C's is 20.F's late start is 26.Which of the following is definitely true?

Which of the following statements regarding CPM networks is true?

The critical path for the network activities shown below is with duration .

A simple CPM network has three activities,D,E,and F.D is an immediate predecessor of E and of F.E is an immediate predecessor of F.The activity durations are D=4,E=3,F=8.

The difference between AON and AOA networks is that:

Slack is the amount of time an activity can be delayed without delaying the entire project.

The ________ is the computed longest time path(s)through a network.

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