The Traditional Waterfall Model
Waterfall method is a classical approach to project management. It is most frequently used for large-scale project development. According to this method, the project is divided into a number of successive phases – requirements analysis, project documentation development, coding, testing and release / launch. In this model, the phases do not ever overlap. Each development stage must be completed before the next is begun. For example, the first task has to be to develop functional requirements of the product. When the documentation is ready, it is possible to move onto the next stage – to start developing internal and external specifications. Upon completion and approval of the specifications coding phase can begin.
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Let us return to the topic of software development. It all sounds nice and very convincing, in theory. This is the standard approach to the production process and the leaders of many qa teams ask programmers to follow it. Long before the start of the testing testers receive the specification that fully describes the product and its goals, benefits, etc. and defines how many subsequent amendments should be made to it. The specification facilitates planning for the testing, the budget formation, scheduling, staff recruitment.
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The described development method was primarily intended for software development on a contractual basis. In this case, the product’s requirements are defined in terms of the customer’s demands, and it is done in advance, as they are the basis for estimating the project cost. In addition, the customer must review and approve the design of the product, multiple data streams specifications, specifications for defining layout and structure of many reports and a number of other details and items, all of these documents should be agreed upon prior to the coding. Only then the actual product development begins.
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