Ellos describen las transformaciones que deben llevarse a cabo y los datos necesarios para cumplir con el Requisito funcional de un sistema. En el modelo de DFD la estructura del sistema es como una red de procesos interconectados compuestos de funciones primitivas. El diccionario de datos es un conjunto de entradas definiciones de los flujos de datos, elementos de datos, archivos y bases de datos. Los diccionarios de datos se dividen de una manera de arriba hacia abajo.
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Analisis Estructurado Moderno Yourdon
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. Structured analysis and design techniques are fundamental tools of systems analysis. They developed from classical systems analysis of the s and s. Structured analysis became popular in the s and is still in use today. 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. One approach is to first define events from the outside world that require the system to react, then assign a bubble to that event. Bubbles that need to interact are then connected until the system is defined.