Waterfall diagram is a model which has no turning back just like a waterfall. Waterfall diagrams are three dimensional plots which show the result in the form of mountains shapes.Like a waterfall flow down from a mountain can never flow up again , the process taken in waterfall method can not be done again. Water fall diagram s allow for departmentalization and managerial control. On the other hand its most serious disadvantage is that it does not allow revision .
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