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The flow of data and control from bubble to the data store to bubble can be difficult to track and the number of bubbles can increase.

Structured analysis consists of interpreting the system concept (or real world situations) into data and control terminology represented by data flow diagrams. Structured analysis became popular in the 1980s and is still in use today. They developed from classical systems analysis of the 1960s and 1970s. Structured analysis and design techniques are fundamental tools of systems analysis.

In software engineering, structured analysis (SA) and structured design (SD) are methods for analyzing business requirements and developing specifications for converting practices into computer programs, hardware configurations, and related manual procedures. Example of a structured analysis approach.