Use Cases
Use cases are both a blessing and a curse. On one hand, they are the absolute Bible of what you need to do to make the application work. Without a well-defined set of use cases, you're at the mercy of the client, who can then add new functionality on a whim and claim that it's inside the scope of the project.
On the other hand, use cases are often the dullest, least interesting, most tedious (did I mention boring?) part of the software-development process. They represent a methodical walk through every single way someone can possibly use the application and every possible outcome. It's somewhat like a brute-force computational approach to software design. In any event, it must be done, so it's best to just get started.
An important ...
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