Requirement analysis is the most important and fundamental stage in SDLC. It is performed by the senior members of the team with inputs from the customer, the sales department, market surveys and domain experts in the industry. This information is then used to plan the basic project approach and to conduct product feasibility study in the economical, operational, and technical areas.
Planning for the quality assurance requirements and identification of the risks associated with the project is also done in the planning stage. The outcome of the technical feasibility study is to define the various technical approaches that can be followed to implement the project successfully with minimum risks.
Usually more than one design approach for the product architecture is proposed and documented in a Design Document Specification. This Document is reviewed by all the important stakeholders and based on various parameters as risk assessment, product robustness, design modularity , budget and time constraints , the best design approach is selected for the product.
A design approach clearly defines all the architectural modules of the product along with its communication and data flow representation with the external and third party modules (if any). The internal design of all the modules of the proposed architecture should be clearly defined with the minutest of the details in Design Document.
In this stage of we actual development starts and the product is built. The programming code is generated as per Design Document Specification during this stage. If the design is performed in a detailed and orgsanized manner, code generation can be accomplished without much hassle.
Developers have to follow the coding guidelines defined by their organization and programming tools like compilers, interpreters, debuggers etc are used to generate the code. Different high level programming languages such as PHP, Java, and many platform like Wordpress, Joomla etc. are used for coding. The language is chosen with respect to the type of website/software being developed.
This stage is usually a subset of all the stages as in the development process, the testing activities are mostly involved in all the stages of process.
However this stage refers to the testing only stage of the product where products defects are reported, tracked, fixed and retested, until the product reaches the quality standards defined in the requirement.
We once the product is tested and ready to be deployed it is released formally in the appropriate market. Sometime product deployment happens in stages as per the organizations’ business strategy.
We are first released in a limited segment and tested in the real business environment.
Then based on the feedback, the product may be released as it is or with suggested enhancements in the targeting market segment.
After the product is released in the market, its maintenance is done for the existing customer base.
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