SCHEDULING BASIC RULES & CONVENTIONS

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Basic Rules for Drawing Networks

 

Rule 1. A complete network should have only one point of entry (a start event) and only one point of exit (a finish event).

 

Rule 2. Every activity must have a preceding or tail event and a succeeding or head event. Many activities may share a tail or a head event but not the same tail and head event.

 

Rule 3. No activity can start until its tail event has been reached.

 

Rule 4. An event is not complete until all the activities leading into it are complete.

 

Rule 5. A series of activities leading back to the same event are not allowed. (Looping)

 

 

Convention for Drawing Networks

 

Convention 1. Networks proceed from left to right.

 

Convention 2. Networks are not drawn to scale. (convenient but not mandatory)

 

Convention 3. Events or nodes should be progressively numbered.(convenient but not mandatory)