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seocompany485

seocompany485   , 45

from Montgomery State of Alaba…

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Software Development Models

There are various software development models in practice in software engineering. Popular amongst them are waterfall method, spiral mode, RAD model and prototype model etc.

Waterfall Model

The waterfall method consists of following development phases.

Requirements, Design, Implementation, Verification and Maintenance

The model focuses on working in series of stages. When one stage is complete then next is initiated and when second finishes the third takes start. So it is a stage by stage in sequence and steps like water fall and water never comes back.

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Requirements

http://www.youtube.com/watch?v=FJkV7KTwnyo



Spiral Model

The spiral model contains similar cycles as are in waterfall method but it contains added risk analysis and 4gl RAD prototyping in the basic waterfall method

Iterative and Incremental Development

Business needs keep on changing and so are the client requirements. The models like waterfall cannot keep pace with changing user environment and hence the need for an Iterative model is unavoidable. The Iterative model is the only way to deliver the software quickly and readily.

RAD Model

Rapid Application Development is a lifecycle for development which is designed to give speedy development work with maintenance scheduling software high quality outputs as compared to traditional model development approaches

RAD consists of four phases.

Requirements planning phaseUser design phaseConstructions phaseCutover phasePrototyping Model

It is often difficult for the common users to create actual requirement for the project and prototype model was developed keeping in view this basic fact. In prototype model the developer develops a sample design or mock-up for the system and that model is shown to client. Client then views it and comments. Upon several discussions the developer thus prepares the requirements and thus develops the actual development.

Various methods are being used while doing prototype like designs showing screen shots for inputs and outputs, using existing system as prototype to suggest enhancements and developing abbreviated or short system to depict the prototype view of the system.

Agile Development

The software development field has seen development of many models for development purposes. Most of them were considered to be non-practical due to one reason or the other. That brought forth the maintenance scheduling software need for a novice method and hence new method called Agile was developed. Agile methodology can be termed as the looking into client requirements and responding to any changes required. It is said to most effective for responding to client requirements and changing development accordingly.