Industrial Engineering and Production Management
PERT

Provides an approach for keeping planning up-to-date
Provides a way for management to require that planning be done on a uniform and logical basis
All of the listed here
Permits management to foresee quickly the impact of variations from the plan

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Industrial Engineering and Production Management
Work sampling is applied for

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
All of these
Estimating the percentage of the time consumed by various job activities

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