system development life cycle (SDLC)

The systems development life cycle (SDLC) is a process used by software organization to design, develop and test to provide high quality and performance software that suits customer expectations of time and cost estimates.

The systems development life cycle (SDLC) concept is used in hardware and software configurations because the system may be composed of hardware only, software only or both.

SDLC is consists of the following stages:

Stage 1: Planning and Requirement Analysis

Requirement analysis is the most important stage in software development life cycle (SDLC). In this stage the requirement of business is gathered by senior and professional team in the industry. Also in this stage the inputs of software is studied, how will be shown in system and working properly and if there is risks will be faced during the execution of software. 

Stage 2: Defining Requirements

After requirement analysis is done, the business requirements is defined clearly and documented. After that the document is approved from the customer. This done by document called .SRS (Software Requirement Specification).

Stage 3: Designing the product architecture

SRS document is shown by project managers to specify the best architecture for the software. Depending on the requirements in the SRS document, more than one design is proposed and documented in a Design Document Specification (DDS). After that the customer will choose the best design.

Stage 4: Building or Developing the software

In this stage of SDLC the software is built by professional team of developers. The developers will follow the design that is specified in DDS document. Variety of programming languages is used to build a software or website such as C, C++, C#, Java and PHP. The programming language is chosen depends on the type of software.

Stage 5: Testing the Product

In this stage the software will be tested properly to achieve the quality standards that are specified in SRS document. In modern SDLC models, the testing is done after each stage to make the software bugs free and high performance.

Stage 6: Deployment and Maintenance

Once the software is tested, in this stage the software will be deployed and test if the software is working fine in customer side. Then maintenance period is specified between the industry and the customer.

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