SCMA 331 DSM 3 Chapter 3 (Project Management) – Flashcards
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__ is the amount of time an individual activity in a network can be delayed without delaying the entire project.
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Slack time
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A project's critical path is composed of activities A (variance .33), B (variance .67), C (variance .33), and D (variance .17). What is the standard deviation on the critical path?
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1.22
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WBS stands for which of the following project management tools?
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Work Breakdown Structure
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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. Given the above scenario, which of the following is correct?
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There are four paths in this network
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An activity has an optimistic time of 11 days, a most likely time of 15 days, and a pessimistic time of 23 days. What is its variance?
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4
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With respect to PERT and CPM, slack is the...
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amount of time a task may be delayed without changing the overall project completion time
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An activity has an optimistic time of 15 days, a most likely time of 18 days, and a pessimistic time of 27 days. What is the expected time?
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19 days
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Which of the following is determined during the forward pass?
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Early Start
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In a PERT network, non-critical activities that have little slack need to be monitored closely
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because near-critical paths could become critical paths with small delays in these activities
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The critical path for the network activities shown below is __ with duration __
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B-C-E; 12
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An activity on a PERT network has these time estimates: optimistic = 2, most likely = 5, and pessimistic = 10. Its expected time is:
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5.33
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The critical path of a network is the
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longest time path through the network.
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PERT analysis computes the variance of the total project completion time as:
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The sum of the variances of all activities on the critical path.
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Which of the following statements regarding PERT analysis is true?
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Only critical activities contribute to the project variances.
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Dummy activities
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are used when two activities have identical starting and ending events.
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Which of the following is a basic assumption of PERT?
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no activity in the network must be repeated
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Which of the following statements regarding Gantt charts is true?
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Gantt charts are visual devices that show the duration of activities in a project.
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Which of these statements regarding time-cost tradeoffs in CPM networks is true?
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Crashing shortens the project duration by assigning more resources to one or more of the critical tasks.
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The EF of an activity is the:
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ES + Activity time
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The three phases involved in the management of large projects are:
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planning, scheduling and controlling.
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An activity on a PERT network has these time estimates: optimistic =2, most likely = 3, and pessimistic 8. Its expected time and variance (if it is a critical activity) are:
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3.67 and 1
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The Beta distribution is used in project management to
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Calculate expected activity times
