Hayriye Ayhan

Gary C. Butler Family Faculty Fellow and
Professor

Contact

 Groseclose 329
 404.894.2308
 Personal website
 Curriculum Vitae
  Contact
  • Hayriye Ayhan Google Scholar

Education

  • Ph.D. Industrial Engineering (1995), Texas A&M University
  • M.S. Industrial Engineering (1992), Texas A&M University
  • B.S. Industrial Engineering (1991), Bogazici University

Expertise

  • Applied Probability
  • Stochastic Processes

About

Hayriye Ayhan is a Professor and Gary C. Butler Family Faculty Fellow in the H. Milton Stewart School of Industrial and Systems Engineering at Georgia Tech.

Dr. Ayhan's research interests include  performance analysis of queueing and production systems and Markov decision processes (with applications to admission control, inventory/production control). Dr. Ayhan received the National Science Foundation CAREER Award in 2000. She is a member of the Institute of Operations Research and Management Sciences (INFORMS) and she is the secretary and the treasurer of the INFORMS Applied Probability Society. She was also a co-chair of the 2025 INFORMS Applied Probability Conference.

She received her Bachelor's in Industrial Engineering from Bosphorous University and her Ph.D. from Texas A&M University (in Industrial Engineering) in 1995.

Research

Dr. Ayhan's research mainly focuses on analysis and control of queueing systems that arise in manufacturing and service operations. In recent years, her research efforts mainly focused on optimal admission control, optimal pricing, optimal dynamic server assignment, and optimal demand driven discharge in queues with customer abandonments.

 

Teaching

Dr. Ayhan enjoys teaching courses in applied probability and stochastic processed at undergraduate and PhD. levels.  She has been the recipient of Thank A Teacher recognition almost very semester and was on the CIOS Honor Roll in Spring and Summer 2025.

Awards and Honors

  • CIOS Honor Roll Spring 2025, Summer 2025
  • Selected to attend the WELI Leadership Workshop 2005
  • Alpha Pi Mu Most Approachable Professor Award 2005
  • National Science Foundation CAREER Award 2000

Representative Publications

J. Hu, S. Andradottir, and H. Ayhan, ``Optimal Control of Queueing Systems with Error-prone Servers,'' Stochastic Systems, 2025, 15, 220--251.
 R. Wu and H. Ayhan, ``Optimal Admission Control in Queues with Multiple Customer Classes and Abandonments,'' Queueing Systems, 2025, 109, 1--33.
G. P. Ilieva and H. Ayhan, ``Optimal Control of Queues with Demand-Driven Discharge,''  Operations Research Letters, 2025, 59 , 107220.
 H. Ayhan and T. Isik, ``Operations Research: Methods and Applications--Queueing'',  Journal of the Operational Research Society, 2024, 75, 423--617.
Z. Yu, S.  Andradottir, and H. Ayhan ``Optimal Control of Supervisors Balancing Individual and Joint Responsibilities,'' Probability in Engineering and Information Sciences , 2023, 1, 1--20.
 S.  Andradottir and H. Ayhan, ``Optimal Server Assignment in Queues with Flexible Servers and Abandonments,'' Stochastic System, 2023, 13, 360--376.
 H. Ayhan, ``Server Assignment Policies in Queues with Customer Abandonments'', Queueing Systems, 2022, 100, 393--395.
H. Ayhan, ``Optimal Admission Control Policies in Queues with Abandonments'', Operations Research Letters, 2022, 50, 712--718.
 S.  Andradottirr, H. Ayhan and D. G. Down ``Synchronous Resource Allocation: Modeling, Capacity, and Optimization'', OR Spectrum, 2022, 1287--1310.
 T. Isik, S.  Andradottir, and H. Ayhan ``Dynamic Control of Non-Collaborative Workers When Reassignment Is Costly'', Production Operations Management, 2022, 31, 1332--1352.
J. Hu, S.  Andradottir, and H. Ayhan ``Server Coordination in Queueing Systems: When and How?'', Probability in Engineering and Information Sciences, 2022, 36, 868--922.
 S.  Andradottir and  H. Ayhan ``Optimizing the Interaction between Residents and Attending Physicians'',  European Journal of Operational Research, 2021, 290, 210--218.
D. F. Silva, B. Zhang, and H. Ayhan ``Optimal Strategies for Managing Complex Authentication Systems'', Annals of Operations Research, 2020, 293, 317--342
 S.  Andradottir, H. Ayhan, and D.G. Down ``Ranking Flexibility Structures in Queueing Systems'',  { European Journal of Operational Research, 2020, 281, 77--86.
 X. Wang, S.  Andradottir,  H. Ayhan, and T. Suk ``Revenue Maximization in Two-Station Tandem Queueing Systems'',  Naval Research Logistics, 2020, 67, 77--107.
 X. Wang, S.  Andradottir, and H. Ayhan ``Optimal Pricing for Tandem Queues with Finite Buffers'' Queueing Systems, 2019, 92, 323--396.
\item D. F. Silva, B. Zhang, and H. Ayhan ``Admission Control Strategies for Tandem Markovian Loss Systems'',  Queueing Systems, 2018, 90, 35--63.
S.  Andradottirr, H. Ayhan and D. G. Down ``Pooling in the Presence of Failures: Efficiency versus Risk'', European Journal of Operational Research, 2017, 256, 230--241.
T. Isik, S.  Andradottir, and H. Ayhan ``Optimal Control of Queueing Systems with Non-collaborating Servers'',   Queueing Systems 2016, 84, 79--110.
 Kim, J-K. and   H. Ayhan, ``Cyclic Queueing Networks with Subexponential Service Times and Finite Buffers'',  IEEE Transactions on Automatic Control, 2015, 60(10), 2756--2761.
 X. Wang, S.  Andradottir, and H. Ayhan, `` Dynamic Server Assignment with Task-Dependent Server Synergy'',   IEEE Transactions on Automatic Control, 2015, 60(2), 570--575.