By now, most companies know that activity-based costing, an innovative accounting system that breaks down overhead far more precisely than old-fashioned systems do, can be used to trim waste, improve service, and make better product-mix and pricing decisions. Yet the actual design and implementation of a successful ABC system remains largely a mystery for many companies. Analyzes the experiences of eight real-life companies who took on the challenge of implementing an ABC system, revealing the mistakes, successes, and ultimate triumphs that resulted in each case. Winner of the Notable Contribution to Management Accounting Literature Award.