System Development Life Cycle

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

• 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

Disadvantage of iterative model

• It is not as much easy to control and use this model.

• No clearly define milestones in this process model.

• No stage is completely filled.

Prototype Model

The process prototype model is the evolution approach of activities in the coursework of program improvement, the creation of prototypes, i.e., deficient adaptation of the computer program being developed.

• Never a standalone, complete formation methodology, but access to handling chosen parts of a bigger, more traditional improvement methodology.

• Attempts to reduce overlapped project risk by breaking a project in to smaller segments & providing more ease-of-change in the work of the system formation method.

• User is involved throughout the development method, which increases the likelihood of user acceptance of the final implementation.

• Small-scale mock-ups of the technique are developed following an iterative alteration method until the Prototype evolves to meet the users requirement .

• A basic understanding of the elemental business downside is critical to avoid determination the incorrect downside.

Advantages of prototype