Advantages Of System Development Model

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INTRODUCTION:
A system development method, often known as a system development life cycle (SDLC), is a structure imposed on the development of a application product. It is often regarded as a subset of technique development life cycle. There's several models for such processes, each describing approaches to a variety of activities that happen in the coursework of the method. Application Engineering (SE) is the application of a systematic, disciplined, quantifiable approach to the development, operation, and maintenance of application, and the study of these approaches; that is, the application of engineering to application because it integrates significant arithmetic, computer science and practices whose origins are in Engineering. Various
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Therefore, although there's number of models each application Development Company adopts the best-suited model, which facilitates the application development method and boosts the productivity of its team members. These type of Model are:

Waterfall Model
• Iterative Model
• Prototype Model
• Spiral Model

Waterfall Model:
The Waterfall model is a traditional, linear, sequential or traditional waterfall application life cycle model. It is a sequential development approach, in which development is seen as flowing steadily downwards through the phases of requirements analysis, design, implementation, testing (validation), integration, & maintenance.
1) Basic
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• Tight control is maintained over the life of the project by extensive written documentation, formal reviews, & approval/signoff by the user & knowledge know-how management occurring at the finish of most phases before beginning the next phase.
Advantages of waterfall model
Each and every stage has well defined deliverable and reached or milestone.
It is an easy process model to understand and user friendly be the use of it.
Disadvantages of waterfall model
The main disadvantage of the waterfall model is
• You cannot go back a step; if the design phase has gone wrong, things can get very complicated in the implementation phase.
• Often, the client is not very clear of what they exactly desires from the program. Any changes
• that they mentions in between may cause plenty of confusion.
• Small changes or errors that arise in the completed program may cause plenty of issues .
• Another major disadvantage of the waterfall model is that, until the final stage of the
• development cycle is Complete, a working model of the program does not lie in the hands of the

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