上游充通大粤 SHANGHAI JIAO TONG UNIVERSITY Three ways to think about the development process: ·A“focusing”process Wide set of concepts-Narrowing- Increasing Specification-The product can be reliably and repeatably producedThree ways to think about the development process: • A “focusing” process • Wide set of concepts- Narrowing￾Increasing Specification-The product can be reliably and repeatably produced