![]() ![]() This may cause a forced repeat of the coding stage for debugging. This is when quality assurance, unit, system and beta tests identify issues that must be resolved. Typically, the system is coded in smaller components, or units, before being put together. The source code is developed using the models, logic and requirement specifications designated in the prior phases. A design specification document is created to outline technical design requirements, such as the programming language, hardware, data sources, architecture and services. This is also when financial and technical resources are audited for feasibility. The system specifications are analyzed to generate product models and business logic to guide production. This stage of development defines and plans the project without mentioning specific processes. ![]() Potential requirements, deadlines and guidelines for the project are analyzed and placed into a formal requirements document, also called a functional specification. When used for a software development process, the waterfall methodology has seven stages: Agile methods use ongoing reiteration, which is an iterative approach that involves designing, developing and testing software in repeated cycles that build upon each other. Contrast that with Agile project management and development methodology. In software development, if an application needs to work on the first try at the risk of losing customers, waterfall is a suitable method because it sets out to achieve that goal.
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