What's wrong - and right - with this picture?
This is a real-world example (found in the wild) of how the simplest of things (in this case, a misunderstanding of roleplaying) can lay waste to a multi-million-dollar project. The problem as...
• 3NF (OLTP), Inmon, Kimball Star (OLAP) and One Big Table (OBT) schemas for Operations (ODS), Enterprise Data Warehousing (EDW), and BI Analytics.
• An ability to reduce complex problems into simple patterns.
• Creative repeatable designs to substantially reduce the cost of ownership.