Guidelines for constructing Network Diagrams:
- Each activity is represented by only one arrow.
- An arrow can represent only one activity
- If two or more activities are identified with the same start & end events. Dummy activity / activities need to be introduced in the network
- Before an activity can be started all preceding activities must be completed
- The flow of diagram is from left to right.
- The arrows are not to the scale
- Arrows should be straight
- Unless absolutely unavoidable, arrows should not be crossed.
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