RAD Model in Software Engineering

Clarifications

It's dead don't use it, never could work, never did work, never will work.
Case tools have little to do with life cycle, less to do with RAD, there was very little formalism in it.
It was a reaction against the waterfall or v life cycle where everything was documented before you coded a line.

The industry renamed RAD, QAD, Quick And Dirty.

In real life gatekeepers are badly paid people with a limp and a cheap uniform, not state of the art business IT developers.

Look at agile, iterative, spiral, moscow, even waterfall, RAD is a disaster waiting to happen.

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for the inventory mangement system what are the steps are requirement and plez tell me about the rad model for inventory system