…can change the process you're measuring. Of course, quantum physicists declare that the act of measurement always changes the measured. In the world of quality management we’re not dealing with such small scales. But the concept still applies.
When we initiate quality improvement projects in business, we need to ask the question, “Are the results we’re getting simply the outcome of increased management attention to the issue?” The worry is that after the project has been embedded as a standard procedure we assume that the benefits will continue.