Part Two: Linear ESPM

When software developers first emerged from the primordial swamps and started building software products, they settled on a simple and straightforward model known as the Waterfall model. It is one of several models that I am classifying as Linear—that is, they move through a sequence of steps in a prescribed order with no feedback loops. Once a step is complete the development process moves to the next step. There is no going back for any reason. Some software development projects meet the criteria for using such approaches. This part discusses the generic model as well as several special cases.