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- identify an initial event and number it as 1 ( an initial event is one which has activities or arrows emerging from it and none entering it

- delete the arrows emerging from event 1 so as to create one or more initial events

- number these new initial events as 2,3,4.....

- repeat steps 2 & 3 until last event is obtained which has no arrows emerging out of it.

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12y ago

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