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Rapid application development (RAD), also called rapid application building (RAB), is both a general term for adaptive software development approaches, and the name for James Martin's method of rapid development. In general, RAD approaches to software development put less emphasis on planning and more emphasis on an adaptive process.
Rapid Application Development (RAD) Model. Rapid application development (RAD) is a software development methodology, which favors iterative development and the rapid construction of prototypes instead of large amounts of up-front planning. The "planning" of software developed using RAD is interleaved with writing the software itself.
Since no single model is sufficient to cover all aspects of a system, the unified process supports multiple architectural models and views. One of the most important deliverables of the process is the executable architecture baseline which is created during the elaboration phase.
Solution developer: Interpret the system requirements and model it including developing the deliverable codes and build the prototypes. Solution tester: Checks the correctness in a technical extent by performing some testing, raise defects where necessary and retest once fixed. Tester will have to provide some comment and documentation.
The spiral model is a risk-driven software development process model. Based on the unique risk patterns of a given project, the spiral model guides a team to adopt elements of one or more process models, such as incremental , waterfall , or evolutionary prototyping .
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The incremental build model is a method of software development where the product is designed, implemented, and tested incrementally (a little more is added each time) until the product is finished. It involves both development and maintenance.