This document provides an introduction and summary of the book "The Performance Manager". It discusses how the book builds on insights from "The Multidimensional Manager" published over 10 years ago. The introduction highlights that global competition has intensified the need for companies to have deep customer insights and focus on profitability. It also summarizes McKinsey research finding that competitive advantage is now hardest to achieve in industries involving complex "tacit" work rather than standardized transactions. The Performance Manager aims to provide lessons on how companies can better leverage information to support high-value decision-makers and deliver sustainable competitive advantages through higher revenue, lower costs, and optimized assets.