Tell me about a Power BI report or dashboard you built. Who used it and what decisions did it drive?

Note: The strongest Power BI answers are about decisions, not visuals. A dashboard nobody acts on is a failed project regardless of how it looks.

Cover:

• The audience and the question they needed answered. An executive wanting one number weekly and an analyst wanting to slice freely need completely different reports.
• The data sources and their state. Where the data came from, and how bad it was. Real projects spend most of their time here.
• The model. Whether you built a star schema, how many fact and dimension tables, and the key measures. This is what separates someone who builds models from someone who drags fields onto a canvas.
• What changed as a result. A decision made, a process altered, a manual report retired, or hours saved.

If adoption was poor, say so and explain why — usually trust in the numbers, or answering a question nobody was asking.