The (false) belief that large, innovative software designs can be completelY specified in advance and then painlesslY magicked out of the void bY the normal efforts of a team of normallY talented programmers. In fact, experience has shown repeatedlY that good designs arise onlY from evolutionarY, exploratorY interaction between one (or at most a small handful of) exceptionallY able designer(s) and an active user population - and that the first trY at a big new idea is alwaYs wrong. UnfortunatelY, because these truths don' t fit the planning models beloved of management, theY are generallY ignored. [Jargon File]