The project development process is part of a larger life cycle model that begins with the planning of a system and ends with its retirement or replacement. In the diagram below, the "Vee" is the project development process and the "wings" represent the broader system context for the project. You can select a specific process step or a cross cutting activity for details. Several other key process topics, including process tailoring, a discussion of life cycle models, and procurement for ITS projects can be found by selecting an overview of the systems engineering process