18 Questions
What does AOA stand for in the context of project management?
Activity on Arrow
What are the beginning or ending points of one or more activities in a project network called?
Nodes
What is the relationship between the earliest start time (ES) and earliest finish time (EF) of an activity?
EF = ES + (estimated) duration of the activity
Which of the following is NOT a component of a project network?
Resources
How is the latest start time for an activity determined?
It is the latest possible time that the activity can start without delaying the completion of the project
What is the critical path in a project network?
The longest path through the project network
What is the formula to calculate the latest finish time (LF) of an activity?
LF = smallest LS of the immediate successors
Which of the following formulas correctly represents the slack of an activity?
Slack = LF - EF
If an activity has an earliest start time of 5 and a duration of 8 weeks, what is its earliest finish time?
13
What is the purpose of calculating slack in the PERT/CPM method?
To identify activities that can be delayed without extending the project completion time
In the given example, what is the latest finish time (LF) for activity D?
24
Which of the following statements about the PERT/CPM method is correct?
The forward pass calculates the earliest start and finish times, while the backward pass calculates the latest start and finish times.
Which of the following is true about PERT (Program Evaluation and Review Technique)?
It utilizes optimistic, average, and pessimistic time estimates
What is the primary purpose of a PERT chart or network diagram?
To graphically represent the critical path of a project
Which of the following is true about CPM (Critical Path Method)?
It is a deterministic model focusing on time and cost
What is an activity in the context of PERT and CPM?
Any portion of a project that requires resources and consumes time
Which technique is more suitable for projects where time required to complete activities is not known in advance?
PERT
What is the primary difference between PERT and CPM?
PERT is a deterministic model, while CPM is a probabilistic model
Study Notes
Project Management Terminology
- AOA stands for Activity on Arrow, which represents a type of project network diagram.
Project Network Components
- Nodes or events represent the beginning or ending points of one or more activities in a project network.
Activity Time Calculations
- The earliest finish time (EF) of an activity is the sum of its earliest start time (ES) and duration.
- The latest start time (LS) of an activity is determined by subtracting the duration from the latest finish time (LF).
- The latest finish time (LF) of an activity is calculated by subtracting the slack from the earliest finish time (EF).
Critical Path and Slack
- The critical path is the sequence of activities that determines the minimum duration required to complete a project.
- The slack of an activity is the difference between its latest finish time and earliest finish time.
- The formula to calculate slack is LF - EF.
Activity Characteristics
- An activity is a specific task or job that must be completed in a project.
- Activities have durations, earliest start times, and earliest finish times.
PERT and CPM Methodologies
- PERT (Program Evaluation and Review Technique) is a methodology used for projects where time required to complete activities is not known in advance.
- CPM (Critical Path Method) is a methodology used for projects where time required to complete activities is known in advance.
- The primary purpose of PERT and CPM is to identify the critical path and determine the minimum duration required to complete a project.
- PERT charts or network diagrams are used to visualize the project network and identify relationships between activities.
Key Differences
- The primary difference between PERT and CPM is the uncertainty of activity durations.
Test your knowledge about PERT (Program Evaluation & Review Technique) and CPM (Critical Path Method) with this quiz! Explore the concepts related to planning and controlling projects using PERT charts.
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