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

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

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Industrial Engineering and Production Management
The critical path of a network represents

The minimum time required for completion of project
Maximum cost required for completion of project
The maximum time required for completion of project
Minimum cost required for completion of project

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