many successful projects have proven that you can develop high-quality code more rapidly (and cost effectively) this way than with the traditional pipelined approach

In highlighting the dangers of big-up-front-design (BUFD) and waterfall development, Agilists seem to advocate no-up-front-design (NUFD) or no-up-front-requirements (NUFR) or no-up-front-architecture (NUFA).