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

The activity is critical and any delay in its performance will delay the completion of whole project
It represents a situation where extra resources are available and the completion of project is not delayed
It represents that a programme falls behind schedule and additional resources are required to complete the project in time
Any one of the above

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Industrial Engineering and Production Management
Which of the following are the guidelines for the construction of a network diagram?

Each activity is represented by one and only one arrow in the network
Dangling must be avoided in a network diagram
Dummy activity consumes no time or resource
All of the these

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