CHAPTER 13 Project Management
PERT and CPM are quantitative analysis tools designed to schedule and control large projects.
ANSWER: TRUE... [Show More] 13.2 13.3 13.4 13.5 13.6 13.7
PERT is a deterministic analysis tool allowing for precise times of activities within a project. ANSWER: FALSE
PERT had its beginnings in a military department of the United States. ANSWER: TRUE
CPM is a probabilistic analysis of managing a project. ANSWER: FALSE
An event is a point in time that marks the beginning or ending of an activity. ANSWER: TRUE
A network is a graphical display of a project that contains both activities and events. ANSWER: TRUE
The optimistic time is the greatest amount of time that could be required to complete an activity.
ANSWER: FALSE 13.8 13.9
PERT is a network technique similar to CPM, but PERT allows for project crashing. ANSWER: FALSE
The most likely completion time of an activity is used to represent that activity’s time within a project.
13.10 The expected completion time and variance of an activity is approximated by the normal distribution in a PERT analysis.
ANSWER: FALSE 13.11
PERT was developed for a project for which activity or task times were uncertain. ANSWER: TRUE
13.12 CPM was developed for use in managing projects which are repeated and about which we have good information as to activity or task completion times.
148Project Management l CHAPTER 13
13.13 With PERT, we are able to calculate the probability of finishing the project on a particular
13.14 With CPM, we are able to calculate the probability of finishing the project on a particular
13.15 A PERT or CPM network shows activities and activity sequences.
13.16 One of the most difficult aspects of using PERT is defining the activities so that they have
measurable/observable starts and finishes.
13.17 Before drawing a PERT or CPM network, we must identify each activity and their
13.18 The three time estimates employed in PERT are: optimistic time, average time, and
In the PERT process, if an activity has zero variance it must be on the critical path.
13.20 Given the variability of the activity completion time, the original critical path we identify in
our PERT analysis may not always be the actual critical path as the project takes place.
In PERT, the activity completion times are modeled using the beta distribution.
In PERT, the earliest finish time in one activity will always be the earliest start time of the
In PERT, the earliest start time for an activity is equal to the latest of the earliest finish times
of all of its immediate predecessors.
149Project Management l CHAPTER 13
13.24 One of the limiting assumptions of PERT is that for any activity to start, all of its immediate
predecessors must be complete.
13.25 One of the limiting assumptions of PERT is that all activities must be completed at some time
during the project.
13.26 One of the most significant benefits of PERT is that it forces the project manager to sit down
and plan the project in great detail – and thus come to an understanding of relationships
between the activities.
Slack is the time an activity can be delayed without impacting the completion time of the
It is never possible to delay an activity without impacting the project completion time.
13.29 The variance of the project completion time is equal to the sum of the variances of all the
In PERT, we assume that the project completion time can be modeled by the normal
13.31 One PERT/COST assumption is that money is spent at a constant rate over the time taken to
complete an activity.
PERT helps the project manager understand both which activities must take place and which
funds must be expended.
13.33 A limitation of PERT/COST is the assumption that money is spent at a constant rate over the
time taken to complete the project.
In CPM, we assume that the cost to complete the task is a linear function of the time to
150Project Management l CHAPTER 13 complete the task. ANSWER: TRUE
In CPM, crashing an activity which is not on the critical path increases the cost of the project. ANSWER: TRUE
In CPM, if we are going to crash an activity, we should crash it to the maximum extent possible.
*13.37 In CPM, crashing an activity which is not on the critical path reduces the cost of the project just as much as crashing one on the critical path.
*13.38 One of the drawbacks to using either CPM or PERT to manage an actual project is the amount of data that must be collected over the life of the project to implement either method.
*13.39 In PERT, the variance in completion time is equal to the variance of the most time consuming activity on the critical path.
*13.40 Given the assumptions in PERT, the probability that a project will be completed in less time than required by the activities on the critical path is approximately 50%.
*13.41 One should always wait until an activity’s latest start time before commencing the activity. ANSWER: FALSE
*13.42 Using PERT/COST, one is able to complete the project for less money than using PERT alone.
ANSWER: FALSE [Show Less]