Life Cycle
Sdlc – Systems Development Life Cycle
The System Development Life Cycle (SDLC), the lifecycle of the development of software for use in systems engineering and software engineering is the process of drafting or revision of systems and models and methods for developing these systems for them. The term usually refers to the computer or information systems.
The concept of SDLC software technical support for software development methodologies. These methods provide a framework for planning and monitoring the development of an information system [1]: The process of software development.
Systems Development Life Cycle (SDLC) is a rational process, systems analyst, used to develop an information system, including requirements, validation, training and user (actor) property. Each SDLC is a quality that meets or exceeds the expectations of the customer to the conclusion on the time and cost estimates, works effectively and efficiently the information, current and planned technical infrastructure, communications and improved cost and low maintenance.
Computer systems are complex and often (especially with the recent increase in Service-Oriented Architecture) to connect multiple legacy systems in the various costs for software. Access to this complexity, a number of systems development life cycle (SDLC) management models: “Waterfall”, “Fountain”, “Spiral”, “construction and repair,” Rapid Prototyping “,” progressive “in sync and stabilize” on.
SDLC models can be replicated in a variety of what is needed to describe. Agile methods like XP and Scrum, focus on issues that can quickly adapt to changes in the development cycle. Iterative methods like Rational Unified Process and Dynamic Systems Development Method, a limited area of the project and the expansion or improvement of products from different iterations. Successive or large pre-planning (BDUF) models like the waterfall of lead, the emphasis on comprehensive planning and an orderly and risks to successful and predictable results.
Some proponents of Agile and iterative confuse the concept of SDLC processes with sequential or “traditional”, but SDLC is a general term for all methods for the development, production and editing software.
Under the project a project can be determined, even with the project life cycle (PLC) and a life in a number of other activities. According to Taylor (2004) “the duration of the project includes all activities of the project, aimed at developing life systems on demand.
Stages of system development
Systems Development Life Cycle (SDLC) to meet the basic steps necessary for the development, explains how the design, analysis, design and implementation, and the next chapter. There are several models of the development cycle of the system. The older model, initially as a Software Development Life Cycle “model of the waterfall: a sequence of stages in which the result at each step the value in relation to others. These stages generally follow the same basic steps, but many different methods give different chain reactions names and the number of steps seems to vary 4.7 is not good to the final development of life-cycle model, but measures can be classified and divided into several phases.
Initiation and Planning
A high level view of the proposed project and determine the objectives of the project. The feasibility study is sometimes used for the project to senior management in an attempt to obtain money. The projects are mainly in three areas of feasibility: examining the economic, organizational and operational or technical nature. Also used as a reference for the project on track and keep the progress of the MIS group review. [8] The GIS is also a complement to these phases. This phase is also known as a phase of analysis.
The goal of systems analysis is to determine where the problem when you try to repair the system. This step means a reduction of the system in different parts and models for analysis, cause analysis of the objectives of the project, reducing the need to create, and the requirements of the user so that specific requirements can be determined. The collection is often required individuals or groups of customer service and you get so many pages of detailed and precise rules.
Design
Office design and operation of the systems in detail, including screen layouts, business rules, process diagrams and other documents. The output of this step describes the new system as a collection of modules or subsystems.
The project is approved, the first reference to document requirements. For each application a set of one or more components of the plan produced as a result of discussions, workshops and / or original work. Design elements describe the desired software features in detail, and especially functional hierarchy diagrams, maps, size images, tables, business rules, business process diagrams, pseudo-code and a complete entity-relationship diagram provides a complete data dictionary. This information for the program in sufficient detail to enable qualified developers, software with the additional contribution of short duration will be developed to describe.
Build
Modular subsystem code will be executed at this time. Unit test module for the development of this phase. This phase will be next to each module required for mixing the involvement of major projects.
Testing
The code is at different levels of testing of software testing. Unit, system and acceptance testing is often requested by users. It is a gray area, there are many different opinions, what are the stages of testing and that repetition occurs. Repetition is generally not the case, some models in stages, but especially the people in this situation.
Type of test:
* Test record.
* Unit tests
* Tests
* Integration test
* Black box testing
* White-box testing
* Regression Testing
* Test Automation
* User Acceptance Testing
* Tests
Operation and Maintenance
The use of the system includes modifications and enhancements to the decommissioning or sunset of the system. The system is an important aspect of SDLC. We propose a senior staff positions within the organization, new changes force changes, the updated system is necessary.
About the Author
David Vilson has written many articles in different domains such as health, beauty, political, computers. For more articles: SDLC
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