1. 
   Waterfall Model
   (programming) A software life-cycle or product life-cycle model, described by W. W. Royce in 1970, in which development is supposed to proceed linearly through the phases of requirements analysis, design, implementation, testing (validation), integration and maintenance. The Waterfall Model is cons...
   Found op http://foldoc.org/Waterfall+Model
   
   
2. 
   Waterfall Model
   (In topic `Tools, Methods & Processes`) The waterfall model is a model of the software development process in which the constituent phases are performed sequentially, possibly with overlap but with little or no iteration. It is modeled after a conventional engineering cycle.
   Found op http://www.it-architects.co.uk/a_-_z_glossary_index/Tools__Methods___Proces
   
   
3. 
   Waterfall model
   The waterfall model is a sequential design process, often used in software development processes, in which progress is seen as flowing steadily downwards (like a waterfall) through the phases of Conception, Initiation, Analysis, Design, Construction, Testing, Production/Implementation and Maintenan...
   Found op http://en.wikipedia.org/wiki/Waterfall_model
   
   

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