Are Your Requirements Complete?

Every system contains at least one (and probably more) set of requirements that fits into one of these categories: the functional who, what, where, when, why, how, and the nonfunctional design and project constraints. No one method or technique captures all requirements, but this approach can assist quality engineers in identifying missing requirements. Our objective is to spot the gaps in the requirements sets—just as a Tetris player spots gaps in those moving blocks—as soon as possible.