7 basic rules to be observed whilst drawing out an arrow diagram

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7 important Rules for Drawing the Network

The following are the basic rules to be observed whilst drawing out an arrow diagram:-

1. To achieve the objective, it must be necessary for every activity on the network to be completed.

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2. An event occurs only after every activity leading to it is completed.

3. No activity succeeding the event can be commenced until after the event has occurred.

4. Two- events can be normally connected by only one activity (or job).

5. An activity should be represented by only one arrow.

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6. Independence of jobs, if any, must be indicated by dummies, if necessary.

7. There will be only one point of entry and one point of exit.

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