Use-cases are very widely used as the basic concept for specifying requirements of commercial information systems. However, one area that causes problems is distinguishing between “Business” and “System” Use Cases. The aim of this article is to shed some light on this issue by highlighting the differences between the two, and proposing a diagrammatic way of showing how they are related. This is illustrated using a more detailed and meaningful example than is used many introductory texts.

We have taken what were previously three separate papers and joined them into one long paper.

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This paper is freely available here in the All 3 Business vs. System Use Cases v1.9.pdf

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