Compilation Method of Construction Schedule Plan 1 Advantages: The degree line corresponds to the time coordinate, which is more intuitive and easy to understand the intention of planning. Disadvantages: (1) The logical relationship between processes (work) can be expressed, but it is not easy to express clearly; (2) Suitable for manual planning; (3) Without rigorous calculation of schedule parameters, it is impossible to determine the key tasks, key routes and time lag of the plan. (4) The plan adjustment can only be carried out manually, and the workload is large. (5) It is difficult to adapt to the large schedule planning system. 2 (1) Node (also known as node, event): 1) starting node; 2) intermediate node; 3) end node. (2) Circuit: In a network graph, a series of arrow lines and nodes are passed in sequence along the arrow direction from the beginning node, and the path to the end node is called a line.In each line, the total duration of one or more lines is the longest, which is called the key line. Generally, it is marked with double or thick lines.The length of other lines is less than that of critical lines, which is called non-critical lines. (3) Drawing rules for network plans: 1 2 3 4 5 6 7 8