You hired analysts. You bought the software. You track everything. So why are your margins shrinking? The irony is that more data often makes us less confident, not more. We overcomplicate, misinterpret, or cherry-pick numbers that confirm our biases. This book exposes the most common metrics mistakes that even experienced leaders make. Then it offers a simple framework to sanity-check every number before it enters a boardroom. You will learn how to question a metric without feeling disloyal to the data. Because the best decisions often come from asking the right question, not from having the most data.