I have 30 years of experience, and specialize in the field of supply chain management with specific knowledge in the areas of production-inventory systems, modeling and analysis and simulation. I have published on such topics as production-inventory systems, queuing network and fluid-flow and animated simulation. My research interests include system modeling and analysis (especially supply chains and telecommunications systems), simulation, stochastic processes and visual modeling environments. I have authored or co-authored over 100 papers and co-authored two books.