Does Waterfall as used today test software during subassembly development, if so its not https://en.wikipedia.org/wiki/Winston_W._Royce https://en.wikipedia.org

Does Waterfall as used today test software during subassembly development, if so its not https://en.wikipedia.org/wiki/Winston_W._Royce https://en.wikipedia.org/wiki/Winston_W._Royce 's waterfall.