Data-warehousing projects are prone to failure. How prone is subject to debate. Various studies show wildly different percentages of failure. For example, according to the Data Warehousing Information Center article "The Case Against Data Warehousing" (http://www.dwinfocenter.org/against.html), the failure rate is between 10 and 90 percent. Failures are variously defined as cost or time overruns, inability to deliver key objectives, or cancellation of the entire warehousing project. Regardless o...