I have 40 years of experience, and specialize in the field of manufacturing and supply chain operations with specific knowledge in the areas of reverse supply chains, time-based competition and process improvement. I have published on such topics as time-based competition, reverse and sustainable supply chains and material requirements planning. My leading accomplishment has been to establish time-based competition as a key strategic concern in operations management. I was the first to write a book and research papers on this subject and this established it as an important research area within operations. Many of the principles of lean production were first recognized in studies of time-based competitive practices.