VU process model
The term process model is used in various contexts. For example, in business process modeling the enterprise process model is often referred to as the business process model.
software process, software products, e.g. architectural descriptions, source code, user documentation, and the roles of people involved in software engineering. Examples: The waterfall model • The spiral model • “V-Modell (XT)” (dt.)
The Waterfall model is the earliest SDLC approach that was used for software development. The waterfall Model illustrates the software development process in a linear sequential flow. This means that any phase in the development process begins only if the previous phase is complete.
The spiral model is a risk-driven software development process model. Based on the unique risk patterns of a given project, the spiral model guides a team to adopt elements of one or more process models, such as incremental, waterfall, or evolutionary prototyping.