Many parts managers underestimate the business management expertise, combined with parts knowledge, that is required to efficiently operate a parts department. Author Gary Naples brings twenty years of parts management experience to By the Numbers: Principles of Automotive Parts Management. This book presents basic parts management principles, along with business and personnel management techniques, in an easy-to-understand format. Each chapter begins with an ""illustrative case"" which describes a typical situation (pertinent to the chapter’s theme) that could occur in ""real-world"" parts departments.