OCR A-Level Business (H431) H431
Introduction to Business
Business Objectives and Strategy
External Influences
Accounting and Finance
Human Resources
Marketing
Operations Management
Operations Management
PERT and the limits of project planning
- 2 things to know
- Components 01, 02 and 03
Overview
Recall questions on PERT, its optimistic, pessimistic and most likely times, the expected time it produces, and what project planning cannot allow for.
What you need to know
Answer each one before you reveal it.
In PERT, what is the optimistic time?
Questions from this subtopic
Each one with the model answer underneath.
- 1
What is PERT?
Model answer
A project planning technique that combines three time estimates for each activity into a single expected duration, so that uncertainty in the estimates is allowed for.
- 2
In PERT, what is the optimistic time?
Model answer
The shortest time an activity could take if everything went as well as it realistically could.
- 3
In PERT, what is the pessimistic time?
Model answer
The longest an activity would take if the foreseeable problems all occurred.
- 4
In PERT, what is the most likely time?
Model answer
The duration the activity would take under normal conditions, and the estimate that would be used if only one figure were available.
- 5
State the formula PERT uses to calculate the expected time of an activity.
Model answer
Expected time = (optimistic time + 4 × most likely time + pessimistic time) ÷ 6.
- 6
An activity has an optimistic time of 4 days, a most likely time of 6 days and a pessimistic time of 14 days. Calculate its expected time.
Model answer
Expected time = (4 + 24 + 14) ÷ 6 = 42 ÷ 6 = 7 days.
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