Industrial Engineering and Production Management
String diagram is used

Where processes require the operator to be moved from one place to another
For checking the relative values of various layouts
When a group of workers are working at a place
All of these

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Industrial Engineering and Production Management
Pick up the incorrect statement about advantages of work sampling

Calculations are easier, method is economical and less time consuming
Simultaneous study of many operators may be made by a single observer
Permits a fine breakdown of activities and delays
No time measuring devices are generally needed

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