Industrial Engineering and Production Management
PERT

Provides a way for management to require that planning be done on a uniform and logical basis
Permits management to foresee quickly the impact of variations from the plan
All of the listed here
Provides an approach for keeping planning up-to-date

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Industrial Engineering and Production Management
When slack of an activity is positive

It represents that a programme falls behind schedule and additional resources are required to complete the project in time
It represents a situation where extra resources are available and the completion of project is not delayed
The activity is critical and any delay in its performance will delay the completion of whole project
Any one of the above

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