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
Motion study of a sequence of operations conducted systematically
Motion study observed on enhanced time intervals
Study of man and machine conducted simultaneously

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Industrial Engineering and Production Management
The basic difference between PERT and CPM is that

Critical path is determined in PERT only
Costs are considered on CPM only and not in PERT
Guessed times are used in PERT and evaluated times in CPM
PERT deals with events and CPM with activities

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