Rules for constructing a network diagram: 1. Each activity is represented by one and only one arrow in the network 2. No two activities can be identified by the same head and tail events (a dummy activity is introduced in such situations)
Rules for constructing a network diagram:1. Each activity is represented by one and only one arrow in the network2. No two activities can be identified by the same head and tail events (a dummy activity is introduced in such situations)