Knowledge Transfer: The Myths and Realities of Supporting a Business Intelligence Initiative

Nearly every business intelligence (BI) initiative has struggled with the issue of preserving the experience gained. Crucial information is uncovered, fundamental decisions made, tradeoffs negotiated, and most of it is lost before the first major enhancement.
If you have to continually revisit design decisions or relearn technology or even the business issues, your ability to sustain continual improvement is severely compromised. Is this more critical in business intelligence?