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

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

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

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
Critical path is determined in PERT only

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Industrial Engineering and Production Management
Critical Path Net Work helps an engineer

To concentrate his attention on critical activities
To be cautious for avoiding any delay in the critical activities to avoid delay of the whole project
To divert the resources from noncritical advanced activities to critical activities
All of these

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