Software Development Process | Software Development Life Cycle | Need of SDLC | SDLC Phases
Software Development Life Cycle or Software Development Process are the terms used in software engineering. It is a standard process that software development organizations follow to design, develop, test and maintain standard quality software products. The purpose of SDLC is to develop high quality software solution within time bound that meets customer expectation and provide cost effective quality assured bug free solution.
SDLC is the complete process required for software development. It is a series of stages that a software product undergo during its overall life cycle. It describes each step from planning and designing to deployment and maintenance of the product. Software Development Life Cycle consists of several phases:
Requirement Analysis & Planning:
Requirement gathering is the first step of SDLC process. In this phase business requirements and user expectations related to the software solution are collected. This phase is necessary for software developers. It helps the developers to understand what the actual expectation is and what they have to implement. After gathering all information regarding development, analysis is done for validity check-up. System Requirement Specification (SRS) document is prepared as a result of requirement gathering and analysing. SRS works as a guideline in overall development process. As per SRS document planning for further development is done.
Designing phase starts after requirement analysis and planning of the product. The main purpose of this phase is design a suitable structure that transform the requirement specifications of SRS into existence. The software architecture is derived from SRS document. The design architecture is defined in Design Document Specification. It clearly defines architectural modules of software product, data flow representation, communication with other modules etc.
Coding | implementation:
This phase is actual implementation phase. After specified design, programming codes are developed for the software product. If the designing is completed properly in detailed and organized way, there will not be any complication in coding. Program developers must follow coding guidelines of their organization. Different high level programming languages are there for coding like C#, PHP, Java, VB, C, C++ etc. selection of programming language depend on the type of software to be develop.
After coding phase it is checked whether developed product is working as per SRS document or not. It is make sure that the product is working as per user specifications. The testers expect to find out any error or flaw in the solution before delivering it to client. This phase goes through different levels of functional and non-functional testing.
Deployment | Delivery:
After successful completion of testing the product is ready for delivery. First the Beta version of software solution is delivered to the client for their experience. If they found any error or any complication, it is reported to development team. They will correct it. After making it bug free it is finally delivered to the client.
After final hand over of the software, some upgradation or changes are required time to time to make it work flawlessly. If users face any issues with the software, it is resolved by the maintenance team.
Need of SDLC
Software Development Life Cycle encourages the software development team to develop a software product in disciplined and systematic way. As the software product is developed in a team, it is necessary to have an ideal way to follow for successful completion of software development. If there will not be any development process, every developer will think of their own working freedom that will create a chaos. It will be very difficult to deliver a quality product in specified time.
SDLC sets the series of stages to follow that not only complete the development properly but also consumes less time in development process. It provide a quality software solution within specified time and expense. Use of System Requirement Specification (SRS) document as a guideline of the project lead to client satisfaction.