We saw in Chapter 3 that measurements should be tied to an organization, project, product and process goals, so that we know what questions we are trying to answer with our measurement program. Chapter 4 showed us how to frame questions as hypotheses, so that we can perform measurement-based investigations to help us understand the answers. But having the right measures is only part of a measurement program. Soware measurement is only as good as the data that are collected and analyzed. In other words, we cannot make good decisions with bad data.