Industrial Engineering and Production Management
String diagram is used

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

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Industrial Engineering and Production Management
Time study is carried out

By breaking up each operation into small elements which are measurable with the help of the measuring device accurately
By finding all the significant informations regarding the job, work place and machine tool etc
By observing and recording the time taken by the operator for an operation
All of these

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