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by Keith Ray.
Original Post: False Dichotomies
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BDUF (big design up front) is not the "opposite" of incremental design, it's part of the continuum of how much design precedes coding/refactoring. In a blog entry where Joel wrote a specification up-front contrasting it with his straw-man view of XP's incremental development, he called what he did BDUF, but it was neither Design (it was specification), nor was it big; he was not doing BDUF, and he was doing something many agile methods promote: creating a specification of the requirements before development. In XP the details of the specification would be delayed until later, but the overall requirements are needed to estimate the Release Plan.
Waste does not mean failure. Advocates of incremental design say that too much design up-front is wasteful, but that doesn't mean up-front design can't be part of a successful project.
BDUF is not the same as "too much" design up-front, so stop saying BDUF when you mean TMDUF (too much design up-front).
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