Question

a. What is SDLC in Software Engineering? Is it mandatory to use it in application development Process? Justify your answer. b. How might you use a model of a system that already exists? Explain why it is not always necessary for such a system model to be complete and correct. Would the same be true if wou were developing a model of a new system?

Answer 1

a) Software Development Life Cycle (SDLC)

Requirement gathering & Analysis Maintenance Design SDLC Deployment Implementation and coding Testing -

Software Development Life Cycle(SDLC)

Software Development Life cycle introduced certain steps in building a product or application. These steps are guide in building a application from initial stage to deployment stage.

There are many applications which are not effective because of not following the SDLC steps properly.

SDLC steps

The main aim of SDLC steps is to deliver a efficient and quality application.

The SDLC steps are:

Requirement gathering and analysis

In this stage, all the requirements are gathered from the customer for the development of application from initial stage to final stage. Here Customer explains how the application should work as per their business requirements. Analysis is to check the requirements are gathered properly or not for the application development.

Design

Here the gathered information is documented and starts the initial phase of application development. This design phase defines how the application is going to work as per the customer requirements.

Implementation and coding

Here the developer starts coding based on the design. The coding phase is very important in application development. If the developer fails to develop a quality code then whole product gets damaged.

Testing

Testing is the also the important step. The tester test the application after coding is done for any vulnerabilities. If tester found any error then the error should be fixed by the developer. Any error left here without fixing leads to end product damage.

Deployment

The final phase of SDLC is deployment. The small portion of product is released into the market and receives the feedback. Based on the feedback, the final end product is released.

Maintenance

The maintenance is the very important. If there are any issues with the application then it should be resolve by the developers. The developers should be proactive in solving issues to maintain the quality of the application.

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It is not mandatory for every application ,but it is mandatory for high quality applications, because the high quality applications are most expensive. By following SDLC phases in developing a application, the outcome of the application comes with high performance.

Developing every application with SDLC phases is very expensive. So customers with large business organizations need high quality applications. High quality applications must follow SDLC phases.