Industrial Engineering and Production Management
Work sampling is applied for

Estimation of the percentage utilization of machine tools
All of these
Estimating the percentage of the time consumed by various job activities
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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Industrial Engineering and Production Management
A big advantage of PERT over Gantt charts is that in the former case

Early start and late finish of an activity are clearly marked
Activities and events are clearly shown
Activity times are clear
Interrelationship among activities is clearly shown

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