What is a sequence of activities defined by the project network logic?

What is a Network Diagram in Project Management?

Whether you’re a project manager or a project team member, you should familiarize yourself with network diagrams — also known as the project schedule network diagram. A project network diagram is an important tool because it helps teams visualize the activities that need to be completed over the duration of a project. It also gives crucial context like task duration, sequence, and dependency.

What is a project network?

A project network is a graph that shows the activities, duration, and interdependencies of tasks within your project.

What is a project schedule network diagram in project management?

A project schedule network diagram visualizes the sequential and logical relationship between tasks in a project setting. This visualization relies on the clear expression of the chronology of tasks and events.

Most often, a project network diagram is depicted as a chart with a series of boxes and arrows. This network diagram tool is used to map out the schedule and work sequence for the project, as well as track its progress through each stage — up to and including completion. Because it encompasses the large tasks that need to occur over the project’s duration, a network diagram is also useful in illustrating the scope of the project.

Benefits of the project management network diagram

A network diagram allows a project manager to track each element of a project and quickly share its status with others. Its other benefits include:

• Visual representation of progress for stakeholders
• Establishing project workflows
• Tracking dependencies and potential bottlenecks

Research also shows that depicting data in a visual way can improve comprehension and enhance retention — meaning that a network diagram can boost performance and productivity while reducing stress among your team members.

Question 1

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Preceding activities are those that must occur before others can be done.

Question 2

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A backward pass is performed when it is necessary to undo some work that has been performed in order to complete it properly.

Question 3

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A merge activity has two or more immediate predecessors.

Question 4

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Float is always measured in exactly the same way as slack.

Question 5

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The PERT technique assumes that durations are more deterministic

Question 6

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Burst activities are those with two or more successor activities.

Question 7

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You must know the mean of an activity in order to determine its standard deviation.

Question 8

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In assigning a value for the most pessimistic (b) duration, the project manager should estimate the duration of the activity to have a 99% likelihood that it will take b or less amount of time.

Question 9

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The late start time should be calculated using a forward pass through the network.

Question 10

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Negative float exists when a project's critical path has been completed more quickly than anticipated.

Question 11

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The term ordered activity means: A) tasks must either precede or follow other tasks in project planning and management. B) tasks cannot be performed unless the project manager issues a specific command to perform the work. C) prior project planning removes the need for any rush so that tasks can be performed in a methodical fashion. D) tasks are not performed unless the customer issues a specific request to perform the work.

Question 12

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A sequence of activities defined by the project network logic is a(n): A) event. B) path. C) node. D) route.

Question 13

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One of the defining points of a network, a junction point joined to some or all of the others by dependency lines, is called a(n): A) event. B) path. C) node. D) burst.

Question 14

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These can be located by doing a backward pass through a network. A) critical paths B) merge activities C) successors D) burst activities

Question 15

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An activity with two or more immediate predecessors is a(n): A) merge activity. B) burst activity. C) float activity. D) event.

Question 16

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The amount of time an activity may be delayed from its early start without delaying the finish of the project is the: A) delay. B) float. C) late start. D) late finish.

Question 17

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The least amount of float is found: A) in a resource-limited schedule. B) after a burst activity. C) on the critical path. D) after a merge activity.

Question 18

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Prior to creating a network, it is important to: A) identify all loops through activities. B) identify the party responsible for each activity. C) calculate the float for each activity. D) understand the activity precedence.

Question 19

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Serial activities are those that: A) flow from one to the next in sequence. B) have sequential numbers. C) have the same numbers. D) should be performed simultaneously.

Question 20

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Concurrent activities are: A) activities that must be done one after the other. B) activities that can be performed at the same time. C) activities that use labor from the same group of workers. D) activities that use resources from the same resource pool.

Question 21

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Which of these statements about this network is best? A) Activities A and B are serial activities. B) Activities B and C are serial activities. C) Activities A and C are serial activities. D) Activity D is a merge activity.

Question 22

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Network logic suggests that: A) Activity D can start any time. B) Activity A must be complete before Activity B can be done. C) Activities A, B and C must be complete before Activity D can be done. D) Activity C must begin before Activity B begins.

Question 23

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What is the earliest that Activity D can begin if Activity A takes 3 days, Activity B takes 5 days, and Activity C takes 7 days? A) day 15 B) day 7 C) day 5 D) day 3

Question 24

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Based on the activity network pictured, what is the best statement? A) Before starting Activity C, Activity A and Activity B must be completed. B) Before starting Activity D, Activity A and Activity B need to be completed. C) Before starting Activity E, Activity A and Activity B need to be completed. D) Before starting Activity C, Activity A and Activity D must be completed.

Question 25

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Based on the activity network pictured, what is the best statement? A) Activity C is a burst activity. B) Activity E has one predecessor, Activity B. C) Activity A and Activity C are merge activities. D) There are no serial activities in this network.

Question 26

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The length of time expected to complete an activity assuming that its development proceeds normally is called the: A) optimistic duration. B) pessimistic duration. C) most likely duration. D) normal duration.

Question 27

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Ray's shipment of materials hit every red light and traffic jam on the way to the site. Upon arrival, half of the material was judged defective, necessitating a trip back to the supplier, and then the same arduous journey back to the site once the new materials were loaded. Traffic was a little better on the second round but the flat tire and subsequent repair caused as much if not more delay than the first trip. In the final analysis: A) the project activity of Material Delivery was pretty close to the optimistic estimate. B) the project activity of Material Delivery was pretty close to the most likely estimate. C) the project activity of Material Delivery had a much higher variance than anticipated. D) the project activity of Material Delivery was pretty close to the pessimistic estimate.

Question 28

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The variance of an activity is given by: A) [1/6(b-a)]2. B) 1/6[b-a]. C) [1/36(b-a)]2. D) 1/36[b-a].

Question 29

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An activity has an optimistic time estimate of 15 days, a most likely estimate of 24 days, and a pessimistic estimate of 40 days. What is the expected duration of the activity? A) less than 27 days but greater than or equal to 26 days B) less than 26 days but greater than or equal to 25 days C) less than 25 days but greater than or equal to 24 days D) less than 24 days

Question 30

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An activity has an optimistic time estimate of 15 days, a most likely estimate of 24 days, and a pessimistic estimate of 40 days. What is the variance of the activity? A) 4.17 B) 25.17 C) 17.36 D) 10.33

Question 31

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An activity has an optimistic time estimate of 7 days, a most likely estimate of 12 days, and a pessimistic estimate of 20 days. What is the expected duration of the activity? A) 13 days B) 13.5 days C) 12 days D) 12.5 days

Question 32

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An activity has an optimistic time estimate of 7 days, a most likely estimate of 12 days, and a pessimistic estimate of 20 days. What is the expected standard deviation of the activity? A) between 2 and 3 days B) between 3 and 4 days C) between 4 and 5 days D) between 5 and 6 days

Question 33

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An activity has a pessimistic time that is three times as long as its most likely time and five times as long as its optimistic time. If the activity variance is 10, what is the expected time? A) about 10 days B) about 14 days C) about 19 days D) about 23 days

Question 34

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Activity Z has estimates a = 5, b = 10, m = 7; activity X has estimates a = 4, b = 11, m = 6; and activity Y has estimates a = 3, b = 12, m = 8. Which of the following statements is best? A) Activity X is longer than Activity Y. B) Activity X has a higher standard deviation than Activity Z. C) Activity Z is shorter than Activity Y. D) Activity Y has a smaller variance than Activity Z.

Question 35

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What is the early start time for Activity D given the activity times and precedence requirements shown in the table? Activity Time Predecessor A 5 -- B 8 A C 4 A D 5 B, C A) 5 B) 9 C) 13 D) 18

Question 36

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What is the late start time for Activity B given the activity times and precedence requirements shown in the table? Activity Time Predecessor A 5 -- B 8 A C 4 A D 5 B, C A) 18 B) 9 C) 13 D) 5

Question 37

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What is the late start time for Activity E given the activity times and precedence requirements shown in the table? Activity Time Predecessor A 4 -- B 7 -- C 8 A D 2 A E 4 B F 5 C, D G 9 E, F H 7 G A) 12 B) 13 C) 14 D) 15

Question 38

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What is the late finish time for Activity D given the activity times and precedence requirements shown in the table? Activity Time Predecessor A 4 -- B 7 -- C 8 A D 2 A E 4 B F 5 C, D G 9 E, F H 7 G A) 14 B) 13 C) 12 D) 11

Question 39

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What is the early start time for Activity G given the activity times and precedence requirements shown in the table? Activity Time Predecessor A 4 -- B 7 -- C 8 A D 2 A E 4 B F 5 C, D G 9 E, F H 7 G A) 14 B) 15 C) 16 D) 17

Question 40

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What is the early finish time for Activity F given the activity times and precedence requirements shown in the table? Activity Time Predecessor A 4 -- B 7 -- C 8 A D 2 A E 4 B F 5 C, D G 9 E, F H 7 G A) 17 B) 12 C) 13 D) 26

Question 41

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What is the slack time for Activity B given the activity times and precedence requirements shown in the table? Activity Time Predecessor A 4 -- B 7 -- C 8 A D 2 A E 4 B F 5 C, D G 9 E, F H 7 G A) 7 B) 6 C) 5 D) 4

Question 42

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What is the slack time for Activity C given the activity times and precedence requirements shown in the table? Activity Time Predecessor A 4 -- B 7 -- C 8 A D 2 A E 4 B F 5 C, D G 9 E, F H 7 G A) 2 B) 1 C) 0 D) 3

Question 43

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What is the float start time for Activity C given the activity times and precedence requirements shown in the table? Activity Time Predecessor A 5 -- B 8 A C 4 A D 5 B, C A) 1 B) 2 C) 3 D) 4

Question 44

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Use the information in the table to determine the late start time for Activity E. Task Predecessor Duration Early Start Early Finish Late Start Late Finish A -- 8 B A 14 C A 23 8 D C, B 6 23 26 E C 32 F D, E 32 38 A) day 23 B) day 26 C) day 32 D) day 17

Question 45

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Use the information in the table to determine the early start time for Activity B. Task Predecessor Duration Early Start Early Finish Late Start Late Finish A -- 8 B A 14 C A 23 8 D C, B 6 23 26 E C 32 F D, E 32 38 A) day 10 B) day 8 C) day 9 D) day 11

Question 46

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Use the information in the table to determine the early finish time for Activity D. Task Predecessor Duration Early Start Early Finish Late Start Late Finish A -- 8 B A 14 C A 23 8 D C, B 6 23 26 E C 32 F D, E 32 38 A) day 23 B) day 26 C) day 29 D) day 32

Question 47

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Use the information in the table to determine the late finish time for Activity B. Task Predecessor Duration Early Start Early Finish Late Start Late Finish A -- 8 B A 14 C A 23 8 D C, B 6 23 26 E C 32 F D, E 32 38 A) day 17 B) day 26 C) day 20 D) day 23

Question 48

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Use the information in the table to determine the slack time for Activity B. Task Predecessor Duration Early Start Early Finish Late Start Late Finish A -- 8 B A 14 C A 23 8 D C, B 6 23 26 E C 32 F D, E 32 38 A) 6 days B) 4 days C) 2 days D) 0 days

Question 49

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What is the slack time for activity E? Task Predecessor Duration Early Start Early Finish Late Start Late Finish A -- 8 B A 14 C A 23 8 D C, B 6 23 26 E C 32 F D, E 32 38 A) 1 day B) 0 days C) 2 days D) 4 days

Question 50

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Use the network diagram and activity lengths in the nodes to determine the early start time for activity D. A) 8 B) 13 C) 14 D) 21

Question 51

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Use the network diagram and activity lengths in the nodes to determine the late start time for activity F. A) 21 B) 24 C) 26 D) 23

Question 52

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Use the network diagram and activity lengths in the nodes to determine the early finish time for activity G. A) 26 B) 25 C) 24 D) 23

Question 53

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Use the network diagram and activity lengths in the nodes to determine the late finish time for activity C. A) 12 B) 13 C) 14 D) 15

Question 54

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Use the network diagram and activity lengths in the nodes to determine the slack time for activity D. A) 3 B) 2 C) 1 D) 0

Question 55

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Use the network diagram and activity lengths in the nodes to determine the early start time for activity D. A) 8 B) 13 C) 14 D) 21

Question 56

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There's an old saying, "The job is not finished until the paperwork is done." From an activity network standpoint, this does not necessarily mean that the paperwork can't begin until the last non-paperwork activity is completed. It might be possible to work on some paperwork as early activities are completed. In order to depict this in an activity network: A) hammock activities could be drawn. B) subroutines could be added. C) shortcuts can be added to the network. D) laddering could be used to redraw the network.

Question 57

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Project Test Bank is composed of activities we will refer to as A, B, C, and D for convenience (and lack of creativity). Durations and precedence requirements are shown in the table. Each of these activities can be conveniently laddered into two sub-activities of equal duration. The first half of each activity serves as the predecessor to its second half and the first half of the original following activity. What is the expected completion time of the laddered project? Activity Length Predecessor A 10 -- B 18 A C 14 A D 20 B, C A) 34 B) 38 C) 42 D) 48

Question 58

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Project Test Bank is composed of activities we will refer to as A, B, C, and D for convenience (and lack of creativity). Durations and precedence requirements are shown in the table. Each of these activities can be conveniently laddered into two sub-activities of equal duration. The first half of each activity serves as the predecessor to its second half and the first half of the original following activity. What is the expected completion time of the laddered project? Activity Length Predecessor A 10 -- B 18 A C 14 A D 20 B, C A) 34 B) 38 C) 42 D) 48

Question 59

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Project Test Bank is composed of activities we will refer to as A, B, C, and D for convenience (and lack of creativity). Durations and precedence requirements are shown in the table. Each of these activities can be conveniently laddered into two sub-activities of equal duration, so activity C in the original project becomes two activities, C1 and C2, each of which lasts 7 days. The first half of each activity serves as the predecessor to its second half and the first half of the original following activity. What is the difference in the late start time for activity C in the original project and activity C1 in the laddered project? Activity Length Predecessor A 10 -- B 18 A C 14 A D 20 B, C A) 3 B) 5 C) 7 D) 9

Question 60

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A gentleman farmer maniacally works on academic projects to raise funds for his true passion, farming. He has identified seven tasks and developed three time estimates (all in days) of the next big project on the farm, replacing the fence at the comedy pasture. Tasks, precedence requirements, and time estimates are shown in the table. What is the expected completion time of the project? Activity Optimistic time Most Likely time Pessimistic time Predecessor Corner Posts 4 5 6 -- String Line 7 8 9 -- Dig Holes 10 12 14 Corner Posts Plant Posts 11 14 17 String Line Weld Top Bar 8 11 14 String Line Paint 9 11 13 Dig Holes, Plant Posts Tack Wire 9 12 16 Weld Top Bar A) 32 days B) 33 days C) 34 days D) 35 days

What are the sequence of activities in a project?

What is sequencing and scheduling in project management?

What is the sequencing technique used to create a project schedule network diagram?

Which of the following is defined as the sequence in which a project must be completed?