Lifecycle Models and Methodologies

Introduction
Lifecycle models where developed in order to carry out tasks in a structured and logical way. Assuming that a project proceeds in a normal and orderly manor, there are steps that need to be followed, depending on what the particular project is. A good example of this would be; Requirements analysis, functional specification, design, implementation, testing and maintenance.
There are several types of lifecycle models. Two of the most commonly used are the waterfall lifecycle and the spiral lifecycle.
The Waterfall Lifecycle Model
The waterfall lifec…