Industrial Engineering and Production Management
Which of the following conditions are necessary for applying linear programming?

The decision variables should be interrelated and nonnegative.
These must be a well defined objective function.
The resources must be in limited supply.
All of these

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

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

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