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This article mainly explains "what is the Project network diagram". The content in the article is simple and clear, and it is easy to learn and understand. Please follow the editor's train of thought to study and learn "what is the Project network diagram".

"Network diagram" is another form of project planning. Each node in the network diagram represents a task, and the connections between nodes represent the correlation between tasks. The difference between Gantt Chart and Gantt Chart is that there is no tree-like task decomposition structure, but the network diagram has great advantages in clarifying the correlation between tasks. Moreover, a wealth of task-related information can be expressed through nodes, and the Gantt chart must be a combination of task list and bar chart to fully express the task details. The network diagram is shown in the figure.

"Network Diagram" is widely used in construction and other large-scale engineering projects, but less in IT or small-scale projects.

Note: introduction of knowledge related to network diagram.

In project management, there are mainly two kinds of network diagrams, which are double-code network diagram and single-code network diagram.

Double-code network diagram: this is a network diagram method in which the work is represented by arrows and the relationship between the work is represented by nodes. This technology has also become the dual-code network AOA (Activity On Arrow, active on the arrow line). This method is widely used in our country, but due to the requirements of international standards, the application of this method is gradually reduced. Dual-code network planning is generally only applicable to the end-to-start relationship representation, so it is often necessary to introduce virtual work to express the logical relationship between all work.

In the dual-code network diagram, work is represented by an arrow connecting two nodes, and each work is defined by two numbers (iMagazine j) (start / end). Each work can therefore be identified by the numbers of these two nodes. The following figure is an example of a dual-code network diagram.

Single-code network diagram: this is a project network diagram that uses nodes to represent work and arrows to represent working relationships. This kind of network graph is usually referred to as the single code network AON (Activity On Node, active on the node). This kind of network diagram can represent four kinds of working relationships (finish-start, start-start, finish-finish, start-finish). This kind of network diagram has extensive generality in the world. and it has been widely implemented and applied in international project management software. The following figure shows an example of a single-code network diagram.

The circle in the figure represents the task, the arrow line represents the relationship between the two tasks, the letter above the arrow line, such as FS, indicates the type of relationship, F is the abbreviation of Finish, and S is the abbreviation of Start.

Microsoft Project adopts single-code network graph technology and does not support dual-code network graph.

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