Hyun-soo Ahn

Phone: (734) 764-6862
Email: hsahn@umich.edu
701 Tappan Street, D8204                
Ann Arbor, MI 48109-1234

Research and teaching interests

• Analysis of Supply Chain and Production System
• Stochastic Optimization
• Queueing System
• Decentralized Economic System

Papers

Archival Journal Papers: Appeared in Print

[1]  Hyun-soo Ahn, Izak Duenyas, and Rachel Zhang. Optimal stochastic scheduling of a two-stage tandem queue with parallel servers. Advances in Applied Probability, 31, 1095-1117, 1999.

[2] Hyun-soo Ahn, Izak Duenyas, and Mark Lewis. Optimal control of a two-stage tandem queueing system with flexible servers. Probability in the engineering and informational sciences, 16, 453-369, 2002.

[3] Ilan Adler., Hyun-soo Ahn, Richard Karp, and Sheldon Ross. Coalescing times for IID random variables with applications to population biology. Random Structures and Algorithms, Vol 23, Issue 2, 155-166, 2003.

[4]  Hyun-soo Ahn, Izak Duenyas, and Rachel Zhang. Optimal control of a flexible server. Advances in Applied Probability. Advances in Applied Probability, 36, 139-170, 2004.

[5]  Hyun-soo Ahn and R. Righter. Multi-actor Markov decision processes, Journal of Applied Probability, Vol. 42, 15-26, 2005.

[6]  Hyun-soo Ahn and Philip Kaminsky. Production and distribution policy in a two stage stochastic push-pull supply chain. IIE Transactions, Vol. 37, Issue 7, 609-621, 2005.

[7]  Hong-Bae Jun, Hyun-Soo Ahn, and Hyo W. Suh. On identifying and estimating the cycle time of product development process, IEEE Transactions on Engineering Management, Vol. 52, 336-349, 2005. -- Honorable mention for 2005 IEEE-TEM  Best Paper Award.

[8] David Kaufman, Hyun-soo Ahn, and Mark E. Lewis.  On the introduction of agile, temporary workers into a tandem queueing system.  Queueing Systems, Vol. 51, 173-186. 2005.

[9] Hyun-soo Ahn, Rhonda Righter, and J. G. Shanthikumar. Staffing decisions for heterogeneous workers with turnover, Mathematical Methods of Operations Research, Vol. 62-3, 499-514. 2005

[10] Ilan Adler., Hyun-soo Ahn, Richard Karp, and Sheldon Ross. A probabilistic model for the survivability of cells. Journal of Applied Probability, Vol. 42, 919-931. 2005

[11]  Hyun-Soo Ahn, M. Mayorga, and J. G. Shanthikumar. Optimal production and capacity policy in a make-to-stock System with multi-class demand. Probability in Engineering and Informational Sciences, Vol. 20., 609-634, 2006

[12] Hyun-soo Ahn and R. Righter. Dynamic load balancing with flexible workers, Advances in Applied Probability, Vol. 38, 621-642, 2006.

[13]  Hyun-soo Ahn , Mehmet Gumus, and Philip Kaminsky. Pricing and manufacturing decisions when demand is a function of prices in multiple periods. Operations Research,  Vol 55, 1039-1057, 2007. (A version with the e-companion appendix is available here)

[14]  Jung-hyun Kim, Hyun-soo Ahn, Rhonda Righter, Optimal Production Policies with Multistage Stochastic Demand Leadtimes (with Jung-Hyun Kim and Rhonda Righter) Forthcoming in Probability in Engineering and Informational Sciences.

[15] Inventory, Discounts, and the Timing Effects (with Mehmet Gumus and Philip Kaminsky) Accepted at M&SOM

[16] Inventory policies for multi-product systems with different life cycles. (with Katia Frank and Rachel Zhang) Under 2^nd Accepted at Naval Research Logistics

Archival Journal Papers: Under Review

[17] Sales Format Decisions in a Supply Chain (with Chia-wei Kuo and Goker Aydin). Under review at Management Science

[18] Dynamic pricing of limited inventories when customers negotiate (with Chia-wei Kuo and Goker Aydin) In preparation for 2^nd round review at Operations Research

[19] Inventory competition with repeat purchase (with Tava Olsen) In preparation for 2^nd round review at POMS.

[20] Advance selling with limited capacity (with Man Yu, and Roman Kapuscinski) In preparation for resubmission at Management Science

[21] Optimal Assortment and Stocking Decision of a Retailer (with Maria Mayorga and Goker Aydin) In preparation for resubmission (Naval Research Logistics)

Honors and Grants

In the News

•  Teaching for laughs, BusinessWeek, September 5, 2007.

• Managing Uncertainty, Dividend (UM Business School Alumni Magazine), Spring 2007.

• Playing the waiting game in a ridiculously long line, Newhouse News Service, November 30, 2005.