System Development Life Cycle

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System development life cycle


What is the system development life cycle? The system development life cycle is the process of developing information systems through investigation, analysis, design, implementation and maintenance. System development life cycle is a systems approach to problem solving and is made up of several phases, each comprised of multiple steps.

System development life cycle is also known as Classic Life Cycle Model (or) Linear Sequential Model (or) Waterfall Method. This has the following activities. . System/Information Engineering and Modeling, Software Requirements Analysis, Systems Analysis and Design, Code Generation, Testing, and Maintenance.

System/Information Engineering and Modeling is always part of a large business system, work begins by establishing requirements for all system elements and then allocating some subset of these requirements to software. This system view is essential when software must interface with other elements such as hardware, people and other resources. System is the basic and very critical requirement for the existence of software in any entity. So if the system is not in place, the system should be engineered and put in place. In some cases to extract the maximum output, system should be re-engineered and spiced up. Once the ideal system is engineered or tuned up, the development team studies the software requirement for the system.
Software Requirements Analysis is also known as feasibility study. In this phase, the development team visits the customer and studies their system. They investigate the need for possible software automation in the given system. By the end of the feasibility study, the team furnishes a document that holds the different specific recommendations for the candidate system. It also includes the personnel assignments, costs, project schedule, and target dates. The requirements gathering process is intensified and focused specially on software. To ...