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

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

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Industrial Engineering and Production Management
Critical Path Net Work helps an engineer

To concentrate his attention on critical activities
To be cautious for avoiding any delay in the critical activities to avoid delay of the whole project
All of these
To divert the resources from noncritical advanced activities to critical activities

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