The Waterfall Model is a common project methodology and is a sequential design method originally conceived for software development but now used for a variety of types of projects (“Studio .com”, n.d.). It has 6 phases: Say no to plagiarism. Get a tailor-made essay on “Why violent video games should not be banned”? Get an original essay Requirements Design Implementation Verification Deployment Maintenance The feature unique to the waterfall model is the sequential nature of the phases when one phase ends, another phase begins Organizations continue to use the waterfall model because it is: suitable for simple or smaller projects, requirements are well understood, easy to understand, easy to manage, clear milestones and comprehensive documentation are several problems associated with the waterfall model, for example, it is not the perfect model for software development because the waterfall mode claims that it can move to another phase. only when it is completed and correct, so it is not possible to go back one step if the design phase is finished. The problem in practice is that it is not possible for any non-trivial project to perfect one phase of the life cycle of a software product before moving on to the next phase, in other words software development cannot be perfect on the first try, you have to try, testing or starting over sometimes, which means you may face a high amount of risk. Another problem is that it is not designed for large, complex projects. Rational Unified Process Primarily responsible for the introduction of Rational Unified Process (RUP) is Rational Software Corporation, a division of IBM. Furthermore, it was introduced in 2003 (“Rational Unified Process”, 2018). Rational Unified Process is a software engineering process. It provides a disciplined approach to assigning tasks and responsibilities within a development organization. Its goal is to ensure the production of high-quality software that meets the needs of its end users, within predictable timeframes and budgets (“Rational Software,” 1998). Additionally, Rational Unified Process helps in the design, planning, implementation, evaluation, and execution of these types of tests. Furthermore, quality assessment is integrated into all activities, including all participants, using objective criteria and measurements and not treating it as a separate activity performed by a separate group, and works for a wide range of projects and organizations. The rational unified process is better than the waterfall model because it supports an iterative approach that increases understanding of the problem through sequential refinements and provides effective solutions through multiple repetitions. An iterative approach is needed that allows for a growing understanding of the problem through successive refinements and to incrementally develop an effective solution through multiple iterations (“Rational Software,” 1998). Furthermore, using an iterative approach resolves the highest risk elements at each stage of the lifecycle and it is useful to address the threat through frequent verifiable progress and through executable releases that qualify continuous end-user participation and feedback; therefore, the development team remains focused on achieving results because each iteration ends with an executable release, and frequent health checks help ensure the project is on schedule. Additionally, the iterative approach makes it easier to make changes to functionality, requirements, and planning. (Rational Software Iterative Model Graph Structure) Rational Unified Process divides a loop of.