The agile model was proposed in the mid-1990s to overcome the existing faults in the waterfall development methodology. The agile model was established to support a project with rapidly responds to changing needs. It places a higher emphasis on face-to-face contact than on written documentation. The development team should be intentionally kept small (5–9 persons) […]

The iterative enhancement model in software engineering combines elements of the linear sequential model with the iterative philosophy of prototyping. In this model, the software is broken down into several modules which are incrementally developed and delivered. Firstly, the development team develops the core module of the system. After that, it is refined into increasing

The evolutionary model is an iterative model as they are characterized in a manner that enables software engineering to develop a complete version of the software. Such models are applied because the requirements often change. So, the end product will be unrealistic, for a complete version is impossible due to tight market deadlines. It is

Spiral Model is developed by Barry Boehm. Its emphasis is on a continuous reassessment of the risks and combining iterative and sequential approaches. Due to continuous emphasis on risk analysis this model is relevant to the realities of software development. Risk Handling in Spiral Model: A risk is an unexpected consequence that could endanger the

V Shaped model is a variant of the waterfall model that emphasises the verification and validation of the Software. Testing of the product is planned with the corresponding phase of development in Software Engineering. Advantages to V Model : Emphases on planning for verification & validation for product in early stages of product development field.