Industrial Engineering and Production Management
In a PERT chart

Only critical activities are numbered
Only selected activities are numbered
Only important activities should be numbered
All activities should be numbered

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Industrial Engineering and Production Management
Work sampling is applied for

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

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Industrial Engineering and Production Management
The essential condition for the decompression of an activity is that

An activity could be decompressed to the maximum extent of its normal time
The project time should change due to decompression
After decompression the time of an activity invariably exceeds its normal time
An activity could be decompressed to the maximum extent of its normal time

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