This book is about drivers of successful management accounting. Successful management accounting services provide an imperatively required support to managers, especially in times of change. But what makes management accounting services successful? It's all explained to students and professionals alike as the authors provide the first comprehensive set of answers to this question. The authors argue it is not the selection of latest tools and techniques but carefully customized services, motivated and skilful employees, and intensive mutual exchanges with managers and open cooperation with other internal service providers. This book assists managers who want to learn how they best profit from a close collaboration with management accountants, controllers who strive to improve the quality of 'their' management accounting, and management accountants alike.