• Design, Control and Coordination of Stochastic Production-Inventory Systems

• Inventory Theory, Supply Chain Management

• Integrating Supply Chain Management and Project Management

• Applications in Supply Chains for Drug Development (e.g. Clinical Trials) and Commercialization

In particular, I have been working on the following projects:

• Inventory Positioning Problems in Multi-Stage and Multi-Product Supply Chains

• Assemble-to-Order Systems, Allocation Rules and Component Commonality

• Project Driven Supply Chains: Integrating Inventory Planning with Project Management

• Clinical Trial Supply Chains: Managing Investigational Drug Supply under Risk of Failure

• The Impact of Information Sharing on Supply Chain Performance

• IPA Gradient Estimators and Online Algorithms for Production-Inventory Systems

• Stochastic  Inventory Systems with Minimum Order Quantity

• Zhao, Y. 2008. Evaluation and Optimization of Installation Base-Stock Policies in Supply Chains with Compound Poisson Demand. Operations Research 56: 437-452

• Zhao, Y. and  B. Melamed 2007. IPA Gradients for Make-to-Stock Production-Inventory Systems with Lost Sales. IEEE Transactions on Automatic Control 52: 1491-1495

• Boros, A., L., Lei, Y. Zhao, H. Zhong. 2007. Scheduling Container Vessels with Conflicting Objectives. Annals of Operations Research 161: 149-170

• Zhao, Y., D. Simchi-Levi. 2006. Performance Analysis and Evaluation of Assemble-to-Order Systems with Stochastic Sequential Lead-times. Operations Research 54: 706-724

•  Zhao, Y., M.N. Katehakis. 2006. On the Structure of Optimal Ordering Policy for Stochastic Inventory Systems with Minimum Order Quantity. Probability in the Engineering and Informational Sciences 20: 257-270

•  Simchi-Levi, D., Y. Zhao. 2005. Safety Stock Positioning in Supply Chains with Stochastic Lead-times. Manufacturing & Service Operations Management 7: 295-318

•  Simchi-Levi, D., Y. Zhao. 2004. The Value of Information Sharing in a Two-Stage Supply Chain with Production Capacity Constraint: The Infinite Horizon Case. Probability in the Engineering and Informational Sciences 18: 247-274

• Simchi-Levi, D., Y. Zhao. 2003. The Value of Information Sharing in a Two-Stage Supply Chain with Production Capacity Constraint. Naval Research Logistics 50: 888-916

• Zhao, Y.  2002. (extended abstract) The Value of Information Sharing in a Two-Stage Supply Chain with Production Capacity Constraint: The Infinite Horizon Case. Manufacturing and Service Operations Management 4: 21-24

• Zhao, Y., B. Melamed. 2004. Make-to-Stock Systems with Backorders: IPA Gradients. Proceedings of the 2004 Winter Simulation Conference 559-567. Washington D.C., December 5-8

• Zhao, Y., J. P. Wang, X. G. Shi. 1998. On the formation of vortex rings and pairs. Acta Mechanica Sinica 14: 113-129

• Zhao, Y., X. G. Shi. 1997. Evolution of a single elliptic vortex ring. Acta Mechanica Sinica 13: 17-25

• Song, J.S., Y. Zhao. 2007. The Value of Component Commonality in A Dynamic Inventory System with Lead Time.

• Lu, Y., J.S. Song, Y. Zhao. 2007. Non-holdback Allocation Rules in Assemble-to-Order Systems.

• Zhao, Y. 2007. Performance Analysis of Acyclic Supply Chains.

• Choi, S., A. Ruszczynski, Y. Zhao. 2007. The Multi-Product Risk Averse Newsvendor with Law-invariant Coherent Measures of Risk.

• Fleischhacker, A., Y. Zhao. 2007. The Dynamic Economic Lot-size Model for Clinical Trial Supply Chains: Planning for Demand Failure.

• Xu, X., Y. Zhao. 2007. Price-Only Contract and Backup Supply.

• Zhang, X. L., Y. Zhao. 2006. The Impact of External Demand Information on Interacting Supply Chains.

• Zhang, X. L., Y. Zhao, J. Vaidya. 2007. Exploring the Benefits of Information Sharing in a Distribution System.

• Zhao, Y. 2006. Performance Analysis of Assemble-to-Order Systems with Compound Poisson Demand and Batch Ordering Policies.

• Chen, C.Y., Y. Zhao. 2008. Integrating Supply Chain Planning with Project Management in Project-Driven Supply Chains.

• B. Melamed, Fan, Y.H., Y. Zhao, Y. Wadi. 2008. IPA Derivatives for Make-to-Stock Production-Inventory Systems with Backorders Using Quasi-Discrete Stochastic Fluid Model.

• Simchi-Levi, D., Y. Zhao. 2006. Three generic methods for evaluating stochastic multi-echelon inventory systems.