Find the relevant data flow chart and business flow chart of the residential property management system

DFD basically has no great influence. Generally speaking, a large number of practical applications are centered on E-R diagrams. In China, it is rarely developed in strict accordance with OOA-OOP. However, describing user system requirements is not a simple matter. DFD allows developers to understand requirements from another angle, and at least has a bridge to communicate with users. Don't think that drawing a good DFD that conforms to the definition of the textbook will definitely develop a good software. This may not be true. It is impossible to talk on paper. The senior developer structure is all in your mind.

Suggested data dictionary.