Industrial Engineering and Production Management
In a PERT chart

Only critical activities are numbered
Only important activities should be numbered
All activities should be numbered
Only selected activities are numbered

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Industrial Engineering and Production Management
Micro motion study is

Analysis of a man-work method by using a motion picture camera with a timing device in the field of view
Study of man and machine conducted simultaneously
Motion study of a sequence of operations conducted systematically
Motion study observed on enhanced time intervals

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