ITPEC IP April 2024 Question 94
Which of the following is a modeling technique that is used for analyzing business operations and system from the viewpoint of the flow of data which is exchanged between processes?
Explanation
DFD — the data flow diagram models business operations and systems as the flow of data between processes.
A DFD uses four elements: processes that transform data, data flows (arrows), data stores, and external entities that are the sources and destinations of data. It shows what data moves where and what processing it passes through, not the order or timing of the processing, and is used in structured analysis to understand the current business and define the new system.
Answer (b)
Why not others:
- •(a) BPR — business process reengineering fundamentally redesigns business processes to improve cost, quality and speed; it is an improvement approach, not a modeling notation
- •(c) MRP — material requirements planning calculates which materials and parts production needs, how many and when to order them
- •(d) WBS — the work breakdown structure decomposes a project's deliverables and work into a hierarchy of manageable pieces
Key rule: A DFD shows data, not control: it answers what flows between processes, stores and external entities, while a flowchart shows the order in which steps happen.
System Development Technology · AI-written, may contain errors
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