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

All of these
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

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

All of these
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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