Specifications and requirements analysis: why they matter

When an IT project goes off the rails, technology often takes the blame. In many cases the starting point lies elsewhere: the need was misunderstood, or understood differently by each person. Requirements analysis and specifications exist to prevent that.

Requirements analysis: understand the problem before the solution

It means understanding what happens today: who does what, with which tools, where the bottleneck is, which constraints apply (regulation, budget, deadlines). You talk to the people who will use the solution, not only to those who fund it.

Specifications: write down what will be built

Specifications describe what the solution must do, in language that both the business and the developers understand. They do not need to be long; they contain:

• use cases: who does what, and why;
• business rules: calculation rules, special cases;
• acceptance criteria: how you will know it is a success;
• priorities: essential, important, nice to have.

Why they matter

• Agree before spending: everyone is talking about the same project.
• Estimate seriously: you price a known scope.
• Accept objectively: acceptance criteria serve as a reference.
• Control changes: every new request is compared with the written scope.
• Hand over: the project stays understandable if someone leaves or a new provider takes over.

A misunderstanding corrected at the start generally costs far less than one discovered once development is finished.

The questions to ask before developing

1. Who will use the solution, and in which situations?
2. Which precise problem must it solve?
3. How is the work done today?
4. What happens in case of error or exception?
5. What data is needed, and where does it come from?
6. Which constraints apply (data protection, security, deadlines)?
7. How will you tell that the project is a success?

And in agile?

Specifying is not reserved for V-model projects. In agile, you write user stories with their acceptance criteria, in small batches. The principle is the same: agree on what will be done before doing it.