A developer's knowledge of a computing system's requirements is necessarily imperfect because organizations change. Many requirements lie in the future and are unknowable at the time the system is designed and built. To avoid burdensome maintenance costs developers must therefore rely on a system's ability to change gracefully-its flexibility. Flex

Johnson, Bruce; Woolfolk, Walter W.; Miller, Robert; Johnson, Cindy

Introduction to flexibility. What is required to achieve flexibility. How to design flexible software systems. Flexibility: Delving deeper.