Question 1

A merge activity has two or more immediate predecessors.

Accepted Answer

A merge activity is a node in a process network that has two or more immediately preceding nodes. It collects data or information from the preceding nodes and combines them into a single flow that then feeds into the next node in the network.

Question 2

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.

Accepted Answer

Understanding the activity precedence is crucial as it determines the sequence in which the activities are performed and the dependencies among them, which ultimately affects the overall project schedule. The identification of loops, responsible parties, and float calculation can come after understanding the activity precedence.

Question 3

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.

Accepted Answer

The "most likely duration" is the term used to describe the length of time expected to complete an activity assuming that its development proceeds normally, without any unforeseen delays or accelerations.

Question 4

An activity has an optimistic time estimate of 17 days, a most likely estimate of 23 days, and a pessimistic estimate of 37 days. What is the variance of the activity?
A) 3.33
B) 6.66
C) 9.99
D) 11.11

Accepted Answer

The answer of An activity has an optimistic time estimate...

Question 5

At a merge point in a forward pass, the largest preceding early finish becomes the early start for that node.

Accepted Answer

This is a correct statement. At a merge point in a forward pass, the largest preceding early finish becomes the early start for that node. This is because the merge point cannot start until all the preceding activities have finished, and the largest early finish time among its predecessors represents the earliest possible starting time for the merge point.

Question 6

Consider a project composed of activities X and Y having equal length and performed in that order. Both activities can be laddered such that the first half of each activity is the predecessor for its own second half, so X1 precedes X2 and Y1 precedes Y2. The first half of X1 is also the predecessor for Y1. If the laddering procedure were performed again activities X and Y would be divided in four parts each, with precedence working as it did in the first split. Derive an expression for the minimum length of the project as laddering increases.

Accepted Answer

The answer of Consider a project composed of activities X...

Question 7

An activity has an optimistic time estimate of 12 days, a most likely estimate of 16 days, and a pessimistic estimate of 22 days. What is the expected standard deviation of the activity?
A) Between 1 and 2 days
B) Between 2 and 3 days
C) Between 3 and 4 days
D) Between 4 and 5 days

Accepted Answer

The answer of An activity has an optimistic time estimate...

Question 8

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? 
A) 34
B) 38
C) 42
D) 48

Accepted Answer

The answer of Project Test Bank is composed of activities...

Question 9

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? 
A) 34
B) 38
C) 42
D) 48

Accepted Answer

The answer of Project Test Bank is composed of activities...

Question 10

What does a network diagram illustrate and why are they important in project management?

Accepted Answer

The answer of What does a network diagram illustrate and...

Question 11

Burst activities are those with two or more successor activities.

Accepted Answer

Burst activities are those with two or more successor activities, but the term specifically used to describe this in project management is not "burst activities" but rather "split activities" or nodes where the path diverges into two or more paths. Burst activities might be confused with the term, but it's not a standard term for this concept.

Question 12

An activity has a pessimistic time that is four times as long as its most likely time and six times as long as its optimistic time. If the activity variance is 12, what is the expected time?
A) About 8 days
B) About 9 days
C) About 10 days
D) About 11 days

Accepted Answer

The answer of An activity has a pessimistic time that...

Question 13

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.

Accepted Answer

The answer of Ray's shipment of materials hit every red...

Question 14

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].

Accepted Answer

The answer of The variance of an activity is given...

Question 15

Activity Z has estimates a = 5, b = 12, m = 7; activity X has estimates a = 5, b = 11, m = 6; and activity Y has estimates a = 3, b = 11, 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.

Accepted Answer

Activity Z has the lowest estimated time (7), followed by Activity X (6) and Activity Y (8). Therefore, Activity Z is the shortest and Activity Y is the longest. We cannot determine the standard deviation or variance from the given information.

Question 16

An activity has an optimistic time estimate of 25 days, a most likely estimate of 29 days, and a pessimistic estimate of 34 days. What is the expected duration of the activity?
A) Less than 31 days but greater than or equal to 29 days
B) Less than 29 days but greater than or equal to 27 days
C) Less than 27 days but greater than or equal to 25 days
D) Less than 25 days

Accepted Answer

The expected duration of the activity can be calculated using the formula: (Optimistic + 4(Most Likely) + Pessimistic) / 6. Plugging in the values: (25 + 4(29) + 34) / 6 = 29.5 days, which is less than 31 days but greater than or equal to 29 days.

Question 17

At a burst point in a backward pass, the largest succeeding late start becomes the late finish for that node.

Accepted Answer

The answer of At a burst point in a backward...

Question 18

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

Accepted Answer

Preceding activities set the necessary foundation or prerequisites for subsequent activities to be completed.

Question 19

What are hammock activities and when should they be used?

Accepted Answer

The answer of What are hammock activities and when should...

Question 20

An activity has an optimistic time estimate of 17 days, a most likely estimate of 22 days, and a pessimistic estimate of 32 days. What is the expected duration of the activity?
A) 22.83 days
B) 23.67 days
C) 24.33 days
D) 25.17 days

Accepted Answer

The expected duration of the activity can be calculated using the formula: (Optimistic + 4(Most Likely) + Pessimistic) / 6. Plugging in the values: (17 + 4(22) + 32) / 6 = 22.83 days.

Quiz 9: Project Scheduling: Networks, Duration Estimation, and Critical Path

A merge activity has two or more immediate predecessors.

Prior to creating a network, it is important to:

The length of time expected to complete an activity assuming that its development proceeds normally is called the:

An activity has an optimistic time estimate of 17 days, a most likely estimate of 23 days, and a pessimistic estimate of 37 days. What is the variance of the activity?

At a merge point in a forward pass, the largest preceding early finish becomes the early start for that node.

An activity has an optimistic time estimate of 12 days, a most likely estimate of 16 days, and a pessimistic estimate of 22 days. What is the expected standard deviation of the activity?

What does a network diagram illustrate and why are they important in project management?

Burst activities are those with two or more successor activities.

An activity has a pessimistic time that is four times as long as its most likely time and six times as long as its optimistic time. If the activity variance is 12, what is the expected time?

The variance of an activity is given by:

Activity Z has estimates a = 5, b = 12, m = 7; activity X has estimates a = 5, b = 11, m = 6; and activity Y has estimates a = 3, b = 11, m = 8. Which of the following statements is BEST?

An activity has an optimistic time estimate of 25 days, a most likely estimate of 29 days, and a pessimistic estimate of 34 days. What is the expected duration of the activity?

At a burst point in a backward pass, the largest succeeding late start becomes the late finish for that node.

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

What are hammock activities and when should they be used?

An activity has an optimistic time estimate of 17 days, a most likely estimate of 22 days, and a pessimistic estimate of 32 days. What is the expected duration of the activity?