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Waterfall model methodology

20 一月, 2016 - 15:30

The oldest and most known methodology used to coordinate the efforts of information systems development is known as the “Waterfall”. The model is based on a generic life cycle stages to guide developers from an initial feasibility study through maintenance of the completed systems. Each stage of the model becomes the input for the following stage, see Figure 5.2. These stages are described as follows:

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Figure 5.5 Waterfall model methodology 
 

Feasibilitystudy: study the existing systems to provide a clear understanding of the problem and to determine project goals.

Systemsanalysis.Analyzes end-user information and determine any deficiencies of the existing systems. Data collected in this stage will be used as part of the new system.

Design:Features and systems functions are described in details, including screen layouts, business rules, process diagrams, programming instructions and other various documentations.

Implementation:Designs are translated into code using programming languages.

Testing:System is put into a testing environment to check for errors and bugs.

Maintenance: The system is put into production in a real business environment. Changes, correction and additions start to crop and the system begins to evolve.