Industrial Engineering and Production Management
The purpose of micro-motion study is to

Assist in finding out the most efficient way of doing work
Train the individual operator regarding the motion economy principles
All of these
Help in collecting the motion time data for synthetic time standards

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Industrial Engineering and Production Management
PERT

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

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