The systems development life cycle (SDLC), is the life cycle of software development for use in systems engineering and software engineering process to create or modify systems and models and methods, to develop people to those systems. The term usually refers to the computer or information systems.
In software engineering, the concept behind the SDLC many types of software development methods. Methods provides a framework for planning and monitoring the creation of information system: the software development process. Overview of SDLC Systems Development Life Cycle (SDLC) is a logical process, system analyst, used for) information systems, including requirements, validation, training, and the user (interested parties to develop the property. All should be SDLC have high quality system that meets or exceed customer expectations, and reached completion on schedule and cost estimates, effectively and efficiently with existing infrastructure and planned and not costly to maintain and improve cost-effectiveness . Computer systems are complex and often (especially with the recent increase in service-oriented architecture) to more traditional systems could occur at the various software vendors to provide connectivity. Although they were created around the complexity, some systems development life cycle (SDLC) models: Cascade, Fountain, Spiral, Construction and Repair, Rapid Prototyping; one example and to stabilize . [Edit] SDLC models can describe a wide range of more flexible to the iterative sequence. Agile methods like XP and Scrum, focus on the processes of capacity, low weight rapidly changes along the development cycle. Iterative methods like the United reasonable Dynamic Process and Systems Development Method is limited to the areas of policy and project development or improving the product of more iterations. Lines or large green design) (BDUF models such as waterfall, to focus on the full and proper planning of large projects and the risks to achieving successful and predictable leader. Some support the concept of SDLC confusion iterative and agile with lines or traditional, but CCES is a general term for the methods to design, implement and launch the software. Project management of project, whether through the project life cycle (PLC) and SDLC, although the activity is defined somewhat differently. According to Taylor (2004) The life of the project, he focuses all activities of the project life cycle including systems, product development needs to create. Stage of development The Systems Development Life Cycle (SDLC) in accordance with the main sections, which are necessary for the developers, such as planning, analysis, design and implementation, and be in the next section. Some existing systems development life-cycle model. The oldest model, which was originally a system development life cycle, the Cascade model: a sequence of steps of each phase output, the entry for next year. Steps generally follow the same basic procedure, but different methods give different names and Kaskadenstufen like to change the number of steps 4 to 7 is certainly a good example of the system development life cycle, but the procedure can be characterized and in several different stages. Initiative / Planning To create a high level view on the proposed project and define the project objectives. The feasibility study is sometimes used to present the project executive in attempt to funding opportunities. The projects will be examined primarily in three areas of feasibility: economic, operational and organizational and technical. It is also used as a reference to keep the project on track and progress of the MIS staff considered.  The GIS also complement the steps. This phase is the analysis phase. requirements to collect and analyze The purpose of the analysis system to determine whether the problem of trying to fix the system. This step breaks the system in various texts and drawings to analyze the situation, involving the analysis of the project objectives, degradation, must be created, and the attempt by the user so that the requirements specified to have been defined. Needs sometimes require the collection of individuals or teams of customer service and parts to get detailed and precise. Design phase Characteristics of the system design and operations are described in detail, including screen layout, business rules, process diagrams and other documents. The result of this phase to describe the new system, the number of modules or subsystems. At the design stage, as the initial entry requirements set out in the document approved rules. For each application a set of one or more of the elements of design as a result of dealing with products of workshops, and / or prototype efforts. Design elements describe the desired characteristics of the software in detail, and usually are functional hierarchy diagrams, screen format maps, tables, business rules, business processes diagrams, pseudo-code, and entity relationship diagram of data complete dictionary. The design elements are intended to describe the program in detail, so that experienced programmers can develop software minimum additional inputs. Build or coding Modular subsystem programming code will be applied in this phase. Modules Unit testing and examination of developers in the step. This phase is mixed with others that the individual modules before integration testing of the key projects. Testing phase The code is tested at various levels in the test software. Unit, system and acceptance testing of the users are often made. The Gray area because there are different opinions as to which stage of the audit and what, if you look at each Iteration. Iteration is not generally part of the waterfall model, but usually with a few at the moment. Types of tests: Registration test *. * Unit Test * The test system * Integration test * Black box test * White-Box Testing * Regression Testing * Test Automation * Acceptance testing * Adopted Operation and Maintenance Implementing the system include changes and improvements before sunset or to cancel the system. The system maintains an important aspect of the SDLC. As a common change in the organization of employees, changes include new applications that require system updates
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