Boehm Spiral Model

ALSO CALLED: Spiral Model
DEFINITION: The spiral model, also known as the spiral lifecycle model, is a systems development lifecycle (SDLC) model used in information technology (IT). This model of development combines the features of the prototyping model and the waterfall model. The spiral model is favored for large, expensive, and complicated projects.The steps in the spiral model can be generalized as follows: The new system requirements  … 
Definition continues below.

BOEHM SPIRAL MODEL DEFINITION (continued): …  are defined in as much detail as possible. This usually involves interviewing a number of users representing all the external or internal users and other aspects of the existing system. A preliminary design is created for the new system. A first prototype of the new system is constructed from the preliminary design. This is usually a scaled-down system, and represents an approximation of the characteristics of the final product. A second prototype is evolved by a fourfold procedure: (1) evaluating the first prototype in terms of its strengths, weaknesses, and risks; (2) defining the requirements … 
Boehm Spiral Model definition sponsored by SearchSoftwareQuality.com, powered by WhatIs.com an online computer dictionary