Waterfall diagram is a popular version of system development life cycle model. The waterfall method describes a linear and sequential method. This method has a distinct aim. Moreover it can not turn back like a waterfall. Waterfall development allows a managerial control and departmentalization. These are the advantages of this method. However there are some disadvanteges of these method too. For example it does not allow reflection and revision. This method can not be interfered after it designed. That is the most important disadvantage of this method.
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