This book students to purchasing as it relates to the supply chain and other functions and systems within an organization, such as marketing, logistics, and operations. The author draws from more than 30 years of practice, instruction, research, and consulting experience to teach students proactive collaboration, negotiation, and analytics. Through a step-by-step approach, readers will gain data-driven purchasing skills crucial for the next generation of professionals. This Edition is fully updated with new real-world cases, the latest research, and current coverage of key trends in the field.