Lastly, review all the defined reference, setup, and other control tables to make sure that the primary tables and all defined processes have all the information available when needed. This is a final design quality control step.

It is important to realize that returning to a previous step to address a previously unidentified issue is not a failure of the process, it is a success. An appropriate quote used in one form or another by construction people, the world over is, Measure twice, cut once. It is much cheaper and more efficient (and less painful) to find and fix design issues during the design phase rather than after the system is in testing or, worse yet, in production.