To show detailed process steps, which diagram is the most appropriate?

To show detailed process steps, which diagram is the most appropriate?

• A. ISO data flow diagram
• B. E-R diagram
• C. UML diagram
• D. Context diagram

Answer: (A)

Showing how data moves through a process with detailed steps is best captured by a data flow diagram. An ISO data flow diagram uses symbols for processes, data stores, data flows, and external entities and can be expanded into levels, so you can detail each subprocess inside a larger process. This makes it ideal for illustrating the exact sequence of processing steps and how data is transformed and stored at each point. An E-R diagram focuses on the relationships between data entities, not on the flow or decomposition of processing steps. A context diagram provides only a high-level boundary view of the system without internal steps. UML diagrams cover a broad range of modeling, including activity diagrams that can show steps, but for detailing the internal steps of a process, the ISO data flow diagram is the most appropriate choice.

Showing how data moves through a process with detailed steps is best captured by a data flow diagram. An ISO data flow diagram uses symbols for processes, data stores, data flows, and external entities and can be expanded into levels, so you can detail each subprocess inside a larger process. This makes it ideal for illustrating the exact sequence of processing steps and how data is transformed and stored at each point.

An E-R diagram focuses on the relationships between data entities, not on the flow or decomposition of processing steps. A context diagram provides only a high-level boundary view of the system without internal steps. UML diagrams cover a broad range of modeling, including activity diagrams that can show steps, but for detailing the internal steps of a process, the ISO data flow diagram is the most appropriate choice.