Industrial Engineering and Production Management
In order that linear programming techniques provide valid results

Only one factor should change at a time, others remaining constant
Relations between factors must be linear (positive)
Relations between factors must be linear (negative)
Either (A) or (B)

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Industrial Engineering and Production Management
The assumption in PERT is

A project can be subdivided into a set of predictable, independent activities
Activities are fixed and can't be changed
A project will always be behind schedule, if left uncorrected
Cost of project will always be more than the estimated cost, if no timely corrections are taken

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Industrial Engineering and Production Management
PERT

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

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