Industrial Engineering and Production Management
In crash program for a project

indirect costs increase and direct costs decrease
cost is no criterion
direct costs increase and indirect costs decrease
both direct and indirect costs, increase

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

Any one of the above
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
It represents that a programme falls behind schedule and additional resources are required to complete the project in time

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