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What is a Software Process Model?

A Process Model describes the sequence of phases for the entire lifetime of a product. Therefore it is sometimes also called Product Life Cycle. This covers everything from the initial commercial idea until the final de-installation or disassembling of the product after its use. Read more...



The Waterfall Model

The waterfall model is believed to have been the first process model which was introduced and widely followed in software engineering. The innovation was that the first time software engineering was divided into separate phases. In the early 1970's there was no awareness of splitting up software development into different phases. Programs were very small, the requirements only a few. Read more...


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The V Model

A further development of the waterfall model led to the so called "V-Model". If you look at it closely the individual steps of the process are almost the same as in the waterfall model. However, there is one big difference. Instead of going down the waterfall in a linear way the process steps are bent upwards at the coding phase, to form the typical V shape. Read more...



The Spiral Model

The Spiral Model is the most flexible and agile of all traditional software process models. The process begins at the centre position. From there it moves clockwise in traversals. Each traversal of the spiral usually results in a deliverable. It is not clearly defined what this deliverable is. This changes from traversal to traversal. Read more...



The Software Development Process

After selecting a Process Model for your business it is necessary to utilize it. This first means to define the overall Product Life Cycle with its engineering disciplines and phases. The next step would be to define detailed activities within each of the phases. The documents and other work products that shall be an outcome of the activities have to be defined in the next step. Read more...



  

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