Fit Criterion for Project Purpose

We have already discussed writing the fit criterion for the project's purpose. Of course, we didn't call it a fit criterion back in Chapter 3 (we called it a measurement), but that is what it is. Let's look quickly at this idea again: The project's purpose is a statement of the reason for making the investment in the project or a definition of the problem it is intended to solve. If you plan to go to the trouble and expense of developing a product, then it makes sense to have an objective benchmark to measure the delivered product against.

The measurement of the purpose is exactly the same as a fit criterion for an individual requirement. The only difference is that the fit criterion measures a single requirement, whereas the purpose's measurement measures the entire project.

Refer to Chapter 3, Project Blastoff, for information on writing a measurable product purpose.