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

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

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Industrial Engineering and Production Management
Pessimistic time is

The minimum time in which an activity can possibly be accomplished
The most probable time considering all conditions
The average time required for a job
The maximum time which an activity might require

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