Use Cases for Iterative Development

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Almost everything I’ve read about use cases focuses on describing what needs to be added to your product. Agile development says “get it working first, make it better second.” That means changing the way the software enables a user to do something they can already do. How do you manage […]

Design-Free Requirements

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Design-Free requirements are important for two reasons, and hard for two other reasons. Design-free requirements are hard because you “know what you want” when you should be documenting “why you want it.” Writing design-free requirements can be hard when you don’t trust your development team to “do the right thing” […]

Concise Requirements

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Concise requirements give your team a useful, easy to read and easy to change understanding of what must be done. Great requirements exist to do three things: Identify the problems that need to be solved. Explain why those problems are worth solving. Define when those problems are solved.

Use Case To Actor Mapping

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We know the importance of identifying the use cases that enable our business goals. We also know the value of understanding the actors that will use our products. This article shows how to demonstrate a simple but powerful view that maps the use cases to the actors.

Cockburn Affirms: Use Cases Rule for Agile!

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We’ve been promoting use cases as the right way to approach agile requirements, and in a recent article, Alistair Cockburn stresses the importance of use cases. Over the last three years, he has found that teams that avoid use cases consistently run into the same three problems. We defer, of […]

Global Processes and Business Rules

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We’ve written before about the importance of separating rules from requirements, particularly in use cases. We wrote that with the goal in mind of reducing the costs of system maintenance. Low-level rules like decision, calculation and inference rules tend to change frequently – and independently of other requirements. So a […]

Business Rules Hidden in Use Cases

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Business rules are not requirements. Yet they are often gathered at the same time as requirements, from the same sources, by the same business analysts. And unfortunately, often documented in the same artifacts. In this article we look at some of the ways that business rules are commonly hidden inside […]