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

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
To concentrate his attention on critical activities

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Industrial Engineering and Production Management
Slack represents the difference between the

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

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