The Waterfall method
The traditional Waterfall software design and development method is based on the gradual and very detailed processing of all software components, each of which must be fully completed before the next can begin. Although the stages may overlap, the name Waterfall is based precisely on the principle of gradual implementation according to a precisely defined description in advance. Detailed analysis and precise processing of the system design is one of the main features of this methodology.
Design and development method
Extensive system project
Before the actual development, an extensive system project is created, often down to the prototype level, on which we verify that the designed system meets all functional and non-functional requirements. Before finalizing the specification, we also recommend going through the questions that need to be answered before starting software development.
User testing
The prototype, if implemented, is verified through user testing, and any observations are incorporated before the actual programming of the application logic.
The emergence of the system
The system is created exactly according to the project, the customer does not have to participate directly during development.
Handover
The finished system is usually delivered in stages or as a whole. There is always an acceptance process to ensure that the project specifications are met.
When to use the Waterfall model?
All system requirements are known in advance and there is no expectation of major changes during development or immediately after deployment. The customer prefers certainty of price and system launch date over the possibility of continuous feedback on the developed software. The Waterfall method can be used, for example, in the development of a custom information system, if its functional requirements are stable, known in advance, and no major changes are expected during implementation.
Advantages and disadvantages the Waterfall method
Advantages
- The price and delivery date of the developed software are known in advance.
- A detailed project is prepared in advance with a list of the functionality and features of the system.
Disadvantages
- Need to approve the full range of requirements in the first phase.
- Long preparation time for the first phase.
- Increase in costs and time in case of changes in requirements.
Not sure whether your project is better suited to a fixed, pre-planned process or ongoing iterations? Take a look at our detailed comparison of the Waterfall method and agile development. For a project with a fixed scope, price and deadline, it's also important to choose a quality software supplier who can realistically assess the complexity of the assignment and potential risks.
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