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

It represents a situation where extra resources are available and the completion of project is not delayed
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

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Industrial Engineering and Production Management
The critical path of a network represents

Maximum cost required for completion of project
Minimum cost required for completion of project
The minimum time required for completion of project
The maximum time required for completion of project

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