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Exam 17: Project Management

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Question 41

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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 is the probability that the critical path for this project will be completed within 75 weeks? 80 weeks? 85 weeks? 90 weeks?

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Question 42

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Consider the following work breakdown structure: $\begin{array} { l c c c c } \text { Activity } & \text { Precedes } & \begin{array} { c } \text { Normal } \\\text { Time (wks) }\end{array} & \begin{array} { c } \text { Crashing } \\\text { Cost } \left( 1 ^ { \text {st } } \text { week } \right)\end{array} & \left( 2 ^ { \text {nd } } \right. \text { week) } \\\hline \text { Start } & \text { A, B } & - & - & - \\\text { A } & \text { C, D } & 6 & 8 & - \\\text { B } & \text { G } & 4 & 5 & 6 \\\text { C } & \text { E } & 4 & - & - \\\text { D } & \text { F } & 5 & 6 & 6 \\\text { E } & \text { H } & 6 & 8 & 8 \\\text { F } & \text { H } & 6 & 7 & 10 \\\text { G } & \text { I } & 8 & 3 & 5 \\\text { H } & \text { End } & 5 & 12 & 15 \\\text { I } & \text { End } & 6 & 5 & -\end{array}$ In crashing this project, which activity should be the first to be reduced?

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Question 43

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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 expected (mean) time for activity E?

A project is represented by the following diagram: The critical path for the network shown is:

A popular tool for planning and scheduling simple projects, and for initial planning on more complex projects, is the:

In project network analysis, "slack" refers to the difference between:

Given this information about activity 3-4: ES = 10, EF = 15, LS = 16, and LF = 21, we can determine that the amount of slack associated with the activity is:

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 probability that the critical path for this project will be completed within 52 weeks?

The costs associated with risk events tend to be lower near the beginning of a project and higher near the end of the project.

At which point does crashing of a project cease?

A sequence of activities that leads from the starting node to the finishing node is called a:

A hierarchical listing of what must be done in a project is called a:

Most likely time generally is more than optimistic time.

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 slack times (in weeks) for activities A-H?

If an activity is determined to be on the critical path, that means that it, and perhaps others, will affect project:

In the project network presented below, numbers on each arrow refer to the expected time and standard deviation in weeks for that particular activity. For example, "8,2" indicates an activity with an expected time of 8 and a standard deviation of two weeks. For this project, determine each of the following: (A) the activities which are on the critical path (B) the expected project duration (C) the probability that the project will be completed in 29 weeks or less

An advantage of Gantt charts in project management is that they identify which activities can be delayed without delaying the overall project.

The network diagram describes sequential relationships among major activities on a project.

Shortening activity durations is called:

Path probabilities are calculated by dividing path mean by path standard deviations.