Drawing technique of double-code Network Diagram

drawing technique of double-code Network Diagram

1, first from the "work schedule" to find all the beginning of the operation (no close to the operation of the operation), draw a node, from the node to say there is a starting process.

2, find all the process of the tight after the process to find all the end of the process. Draw a node and introduce all the end operations to this node.

3, drawing close before the process has two or more than two of the operation of the diagram, pay attention to "sink into a point"

4, painting virtual process, "work schedule" has been hinted, in front of three points on the basis, especially the third step, to appear contradictions, we must draw virtual process.