This is the final chapter of Part III, How to Design Flexible Software Systems. In many ways, it is also the final chapter of this book, because Part IV acts rather like an appendix, providing details about UniverSIS and the generic-entity cloud (GEC). Having looked at building systems with flexibility characteristics, we now want to consider applying those design factors to purchased systems. We also want to relate flexibility characteristics to the important issue of software quality and to project management:

What is the connection between flexible systems and various quality movements?