Risks in implementing DW:
No mission or objective
Quality of source data unknown
Skills not in place
Inadequate budget
Lack of supporting software
Source data not understood
Weak sponsor
Users not computer literate
Political problems or turf wars
Unrealistic user expectations
Architectural and design risks
Scope creep and changing requirements
Vendors out of control
Multiple platforms
Key people leaving the project
Loss of the sponsor
Too much new technology
Having to fix an operating system
Geography distributed environment
Team geography and language culture