![]() Maintenance accounts for 60% of the overall effort required to construct a complete product. The most crucial phase of a software's life cycle is maintenance. ![]() Finally, the whole functional system gets obtained and tested after all modules have been adequately merged and tested. Previously planned modules get added to the partially integrated system during each integration stage, and the resulting system gets tested. The integration of several modules is done sequentially in a series of steps. Integration of various modules occurs after they have been coded and unit-tested. The unit testing step aims to determine whether or not each module is functioning correctly. As a result, each designed module is coded. The software design is converted into source code using any appropriate programming language during the coding step. A Software Design Document employed (SDD) to document all of this work. It consists of both high-level and detailed design, as well as overall software architecture. This phase's purpose is to translate the requirements obtained from the SRS into a format that can be programmed. The requirement analysis and specification phase aims to understand and accurately document the customer's requirements. The best answer is selected, and all subsequent phases follow this solution plan. These several recognized alternatives are examined based on their benefits and downsides. The feasibility study analyzes the problem and determines the many feasible solutions. This phase establishes whether developing the program is financially and technically possible. Phases of Waterfall Model Feasibility Study When resources are adequately prepared and ready to use.When the tools and techniques utilized are consistent and do not change.When the requirements are steady and do not change frequently.The Waterfall model is best suited in the following situations:
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