Industrial Engineering and Production Management
When slack of an activity is positive

Any one of the above
The activity is critical and any delay in its performance will delay the completion of whole project
It represents that a programme falls behind schedule and additional resources are required to complete the project in time
It represents a situation where extra resources are available and the completion of project is not delayed

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Industrial Engineering and Production Management
Micro motion study is

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

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