ABSTRACT
While using an extreme waterfall model (no overlapping), each of these phases comes to completion before starting the next phase. In actuality, such lack of phase overlapping is seldom the case on real projects although there is no rule for how often to update specifications, products, and verification activities. Figure 2.1 shows a high-level picture of a generic launch process. Enterprises may break these four phases down into many more “gates;” for example, some launch processes at Ford Motor Company have as many as twelve gates.
