The dual-code time-scaled network diagram is a widely used network planning diagram that combines the advantages of the dual-code network diagram and the bar diagram.
How to draw a double-code network diagram? We usually use the indirect drawing method, which is divided into four steps.
The following examples illustrate
| Process code |
previous process |
Process time |
| A |
-- |
2 |
| B |
A |
3 |
| C |
A |
1 |
| D |
B |
5 |
| E |
B．C |
2 |
| F |
AND |
4 |
1. Draw a two-code network sketch
2. Calculate the early time of each node in the dual-code network diagram
3. Draw each node at the corresponding position on the timeline according to the early time
4. Connect each node with the specified line shape (solid line, dotted line, wavy line)
From the above figure, we can directly see the start and end time of each work, the free time difference (length of the wavy line) of each work, and the total construction period of the project.