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

The activity is critical and any delay in its performance will delay the completion of whole project
All of these
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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Industrial Engineering and Production Management
Work sampling is applied for

Estimating the percentage of the time consumed by various job activities
All of these
Estimation of the percentage utilization of machine tools
Finding out time standards, specially where the job is not repetitive and where time study by stop watch method is not possible

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