It’s been well established in lean companies that traditional management accounting systems do not provide relevant and reliable information to decision makers. The CFO, as steward of a company’s management accounting system, must provide the leadership to improve the quality of the information produced by a company’s management accounting system so it is aligned with a company’s lean strategy, lean operations, and continuous improvement. The integration of a lean management accounting system with a company’s lean strategy will lead to improved decision making by all users and drive long-term financial success. Lean management accounting helps all users, from executives to line managers, better understand the relationships between lean operating performance and financial performance. Written in the style of a practice guide, is written not just for CFOs, but for all stakeholders of a company’s management accounting system, such as executives and owners, lean leaders, functional managers, and accounting professionals.