Procedure for Development The following is a brief overview of the typical steps involved in developing a system using the spiral life cycle model. The spiral model, which combines these two involves the following steps of development. The waterfall model is a method of sequential and linear advancement of a development through different stages, while the prototyping model constitutes building and testing of a required prototype. SDLC is simply a model that provides procedure and guidelines for various phases of software development, such as requisite, architecture, application and testing followed by maintenance.

It can be defined as a model based on SDLC (system development life cycle), which integrates the characteristics of the waterfall model and the prototyping model.

The spiral model, also known as the spiral life cycle model, is a new approach towards software development, which is considered to be an ideal option for projects in which complexity is much higher and the costs involved are expected to be greater.