Industrial Engineering and Production Management
The important file in making a PERT is

All of the these
An event can't be accomplished until activities leading to it are completed
No activity from any event can be started from preceding event till it is completed
Length of arrow has nothing to do with time

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Industrial Engineering and Production Management
The essential condition for the decompression of an activity is that

The project time should change due to decompression
After decompression the time of an activity invariably exceeds its normal time
An activity could be decompressed to the maximum extent of its normal time
An activity could be decompressed to the maximum extent of its normal time

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

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

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