Data analytics, DWH and BI solution implementation is a journey, not a destination.
This journey often happens with efforts of several parties over the course of years. From time to time you have to look back, look forward, and assess: are you still doing the right thing? Are you convinced that your current architecture fits the future of your organization? Do you have concerns about the performance/security/usability/overall sanity of the solution?
A typical DWH audit project generally consists of several parts.