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SCMA 331 DSM 3 Chapter 3 (Project Management)

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

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