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 solutions within time-bound that meets customer expectations and provide cost-effective quality assured bug-free solutions.
Important SDLC Phases
SDLC is the complete process required for software development. It is a series of stages that a software product undergoes during its overall life cycle. It describes each step from planning and design 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 the 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 the development, analysis is done for validity check-up. System Requirement Specification (SRS) document is prepared as a result of requirement gathering and analyzing. SRS works as a guideline in the overall development process. As per SRS document planning for further development is done.
The designing phase starts after requirement analysis and planning of the product. The main purpose of this phase is design a suitable structure that transforms the requirement specifications of SRS into existence. The software architecture is derived from the SRS document. The design architecture is defined in the Design Document Specification. It clearly defines architectural modules of a software product, data flow representation, communication with other modules, etc.
Coding | implementation:
This phase is the actual implementation phase. After a specified design, programming codes are developed for the software product. If the design is completed properly in a detailed and organized way, there will not be any complication in coding. Program developers must follow the 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 depends on the type of software to be developed.
After the coding phase, it is checked whether the developed product is working as per the SRS document or not. It makes 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 the 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 the software solution is delivered to the client for their experience. If they found any error or any complication, it is reported to the development team. They will correct it. After making it bug-free it is finally delivered to the client.
After the final hand over of the software, some up-gradation or changes are required from 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 a 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 chaos. It will be very difficult to deliver a quality product in a specified time.
SDLC sets the series of stages to follow that not only complete the development properly but also consume less time in the development process. It provides a quality software solution within specified time and expense. Use of System Requirement Specification (SRS) document as a guideline of the project leads to client satisfaction.
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