Industrial Engineering and Production Management
Pick up the incorrect statement about advantages of work sampling

Calculations are easier, method is economical and less time consuming
Permits a fine breakdown of activities and delays
No time measuring devices are generally needed
Simultaneous study of many operators may be made by a single observer

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Industrial Engineering and Production Management
Slack represents the difference between the

Proposed allowable time and the earliest expected time
Normal allowable time and the latest expected time
Latest allowable time and the earliest expected time
Latest allowable time and the normal expected time

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

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

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