Read "an algorithm for evaluating the impact of demand changes" (2)

I. solution space (demand dependency diagram)

Directed Graph. If an RV depends on Ru, an edge points from the rv to the ru. The RV is called the arc tail, and the Ru is called the arc header. The adjacent matrix is used as the storage structure of the directed graph.

 

Ii. Spatial Structure solution-completely n-tree

Set n requirements to 1.2.3... N number. The solution space can be expressed as a completely n-Cross Tree with a height of N + 1. In fact, the graph is used to represent more space-saving, however, the tree can better illustrate the solution space-including all dependencies.