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Exam 17: Project Management

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Question 31

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Consider the following work breakdown structure: $\begin{array}{l}\begin{array} { l c c c c } &&&\text { Time Estimates (days) }\\\text { Activity } & \text { Precedes } & \text { Optimistic } & \text { Most Likely } & \text { Pessimistic } \\\hline \text { Start } & \text { A, B } & - & - & - \\\text { A } & \text { C, D } & 44 & 50 & 56 \\\text { B } & \text { D } & 45 & 60 & 75 \\\text { C } & \text { E } & 42 & 45 & 48 \\\text { D } & \text { F } & 31 & 40 & 49 \\\text { E } & \text { F } & 27 & 36 & 39 \\\text { F } & \text { End } & 58 & 70 & 82\end{array}\end{array}$ What is the estimated slack time for activity D?

A) 0 days
B) 30 days
C) 40 days
D) 50 days
E) 100 days

F) B) and D)
G) A) and E)

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Question 32

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Which of the following leads to simulation being a useful tool with uncertain activity times?

A) paths that are not independent
B) activity times that are not deterministic
C) activity times that cannot be crashed
D) noncritical paths that have no variability
E) critical paths with activities with deterministic time estimates

F) B) and D)
G) A) and E)

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Question 33

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The advantage a precedence diagram has over a Gantt chart is:

Which of the following is not one of the six key decisions in project management? (I) Selecting the project team (II) Deciding on the project manager's title (III) Managing and controlling project resources (IV) Deciding which projects to implement (V) Selecting the project manager

Consider the following work breakdown structure: $\begin{array} { l c c c c } \text { Activity } & \text { Precedes } & \begin{array} { c } \text { Normal } \\\text { Time (wks) }\end{array} & \begin{array} { c } \text { Crashing } \\\text { Cost } \left( 1 ^ { \text {st } } \right. \text { week) }\end{array} & \left( 2 ^ { \text {nd } } \right. \text { week) } \\\hline\text { Start } & \text { A, B } & - & - & - \\\text { A } & \text { C, D } & 6 & 8 & - \\\text { B } & \text { G } & 4 & 5 & 6 \\\text { C } & \text { E } & 4 & - & - \\\text { D } & \text { F } & 5 & 6 & 6 \\\text { E } & \text { H } & 6 & 8 & 8 \\\text { F } & \text { H } & 6 & 7 & 10 \\\text { G } & \text { I } & 8 & 3 & 5 \\\text { H } & \text { End } & 5 & 12 & 15 \\\text { I } & \text { End } & 6 & 5 & -\end{array}$ What is the total cost of reducing this project by two weeks?

Once a project is approved and underway, project managers are only responsible for effectively managing time and costs which, if done well, will assure project completion on time and on budget.

Consider the following work breakdown structure: $\begin{array}{r}{\text { Time Estimates (wks) }} \\\begin{array}{lccccc}& \text { Start } & \text { Finish } \\\text { Activity } & \text { Node } \quad\quad& \text { Node } \quad\quad& \mathrm{t}_{0} \quad\quad& \mathrm{t}_{\mathrm{m}} \quad& \mathrm{t}_{\mathrm{p}} \quad\\\hline \text { A } & 1 & 2 & 11 & 20 & 29 \\\text { B } & 2 & 3 & 2 & 5 & 8 \\\text { C } & 2 & 4 & 18 & 30 & 42 \\\text { D } & 3 & 4 & 7 & 10 & 13 \\\text { E } & 1 & 4 & 31 & 40 & 43\end{array}\end{array}$ What is the estimated standard deviation in the time for activity E?

The probability of occurrence of risk events is lower near the beginning of a project and higher near the end of the project since very few activities remain.

In order to determine the probability of timely project completion, it is sometimes necessary to take into account paths other than the critical path.

Activities not on the critical path have a slack time equal to zero.

Consider the portion of a project depicted by this graph: What is the latest start time of activity 6-7 if the latest finish of activity 7-8 is 26, and the latest finish of activity 7-9 is 23?

Which of the following stages is that one in which the project's expected costs, benefits, and risks are assessed?

Matrix organizations transfer control of workers to project managers for the duration of the project.

The total cost of crashing any one activity should never exceed 20 percent of the total cost of the original project.

The project management strategy of injecting additional resources in order to reduce the length of the project is called:

Consider the following work breakdown structure: $\begin{array}{l}\begin{array} { l c c c c } &&&\text { Time Estimates (days) }\\\text { Activity } & \text { Precedes } & \text { Optimistic } & \text { Most Likely } & \text { Pessimistic } \\\hline \text { Start } & \text { A, B } & - & - & - \\\text { A } & \text { C, D } & 44 & 50 & 56 \\\text { B } & \text { D } & 45 & 60 & 75 \\\text { C } & \text { E } & 42 & 45 & 48 \\\text { D } & \text { F } & 31 & 40 & 49 \\\text { E } & \text { F } & 27 & 36 & 39 \\\text { F } & \text { End } & 58 & 70 & 82\end{array}\end{array}$ What is the probability that the critical path for this project will be completed within 210 days?

In the execution phase of a project's life cycle, activities are guided by decisions that were made in the __________ phase.

Consider the following work breakdown structure: $\begin{array}{r} \text { Duration Estimate (Days) }\quad \quad \quad \quad \\\begin{array}{lccccc} & \text { Start } & \text { Finish } \\\text { Activity } & \text { Node } & \text { Node } & \text { Optimistic } & \text { Most Likely } & \text { Pessimistic } \\\hline \text { A } & 1 & 2 & 9 & 15 & 21 \\\text { B } & 1 & 3 & 13 & 21 & 23 \\\text { C } & 2 & 4 & 6 & 9 & 18 \\\text { D } & 2 & 5 & 23 & 35 & 47 \\\text { E } & 3 & 5 & 19 & 26 & 27 \\\text { F } & 4 & 6 & 23 & 29 & 41 \\\text { G } & 5 & 6 & 14 & 20 & 26 \\\text { H } & 6 & 7 & 2 & 5 & 8\end{array}\end{array}$ What are the estimated standard deviations (in weeks) in the times for activities A-H?

There are four activities on the critical path, and they have standard deviations of 1, 2, 4, and 2 days. The standard deviation of the critical path is:

Consider the following work breakdown structure: $\begin{array}{l}\begin{array} { c c c c c } &&&\text { Time Estimates (days) }\\\text { Activity } & \text { Precedes } & \text { Optimistic } & \text { Most Likely } & \text { Pessimistic } \\\hline \text { Start } & \text { A, B, C } & - & - & - \\\text { A } & \text { D } & 38 & 50 & 62 \\\text { B } & \text { E } & 90 & 99 & 108 \\\text { C } & \text { End } & 85 & 100 & 115 \\\text { D } & \text { F } & 19 & 25 & 31 \\\text { E } & \text { End } & 91 & 100 & 115 \\\text { F } & \text { End } & 62 & 65 & 68\end{array}\end{array}$ What is the estimated expected (mean) time for activity E?