Research

Published Papers 

Operations Research and Management Science Journals

1. Sarah Yini Gao, Yan He, Ruijie Zhang, Zhichao Zheng, Shao Wei Lam, Emile Tan, Optimizing initial screening for colorectal cancer detection with adherence behavior, accepted for publication at Management Science [pdf web]

2. Guang Cheng, Jingui Xie, Zhichao Zheng, Haidong Luo, Oon-Cheong Ooi, Extubation decisions with predictive information for mechanically ventilated patients in ICU, accepted for publication at Management Science [pdf web]

3. Tao Lu, Zhichao Zheng, Yuanguang Zhong, Maximizing the benefits of an on-demand workforce: Fill-rate-based allocation and coordination mechanisms, Manufacturing & Service Operations Management, 2023, 25(6):1999–2370 [pdf web]

4. Zuo-Jun Max Shen, Jingui Xie, Zhichao Zheng, Han Zhou, Dynamic scheduling with uncertain job types, European Journal of Operational Research, 2023, 309(3):1407–1060 [pdf web]

5. Guang Cheng, Sarah Yini Gao, Yancheng Yuan, Chenxiao Zhang, Zhichao Zheng, On the test accuracy and effective control of the COVID-19 pandemic: A case study in Singapore, INFORMS Journal on Applied Analytics, 2022, 52(6):471–582 [pdf web]

6. Guodong Lyu, Mable C. Chou, Chung-Piaw Teo, Zhichao Zheng, Yuanguang Zhong, Stochastic knapsack revisited: The service level perspective, Operations Research, 2022, 70(2):729–747 [pdf web]

7. Abraham Zhang, Zhichao Zheng, Chung-Piaw Teo, Schedule reliability in liner shipping timetable design: A convex programming approach, Transportation Research Part B: Methodological, 2022, 115:499–525 [pdf web]

8. Yue Tang, Houyuan Jiang, Jingui Xie, Zhichao Zheng, A queueing model for customer rescheduling and no-shows in service systems, Operations Research Letters, 2021, 49(6):821–828 [pdf web]

9. Jiayi Liu, Jingui Xie, Kum-Khiong Yang, Zhichao Zheng, Effects of rescheduling on patient no-show behavior in outpatient clinics, Manufacturing & Service Operations Management, 2019, 21(4):780–797 [pdf web]

10. Guodong Lyu, Wang-Chi Cheung, Mable C. Chou, Chung-Piaw Teo, Zhichao Zheng, Yuanguang Zhong, Capacity allocation in flexible production networks: Theory and applications, Management Science, 2019, 65(11):5091–5109 [pdf web]

11. Yuanguang Zhong, Zhichao Zheng, Mable C. Chou, Chung-Piaw Teo, Resource pooling and allocation policies to deliver differentiated service, Management Science, 2018, 64(4):1555–1573 [pdf web]

12. Zhichao Zheng, Karthik Natarajan, Chung-Piaw Teo, Least squares approximation to the distribution of project completion times with Gaussian uncertainty, Operations Research, 2016, 64(6):1406–1421 [pdf web]

13. Qingxia Kong, Chung-Yee Lee, Chung-Piaw Teo, Zhichao Zheng, Appointment sequencing: Why the smallest-variance-first rule may not be optimal, European Journal of Operations Research, 2016, 255(3):809–821 [pdf web]

14. Xiaobo Li, Karthik Natarajan, Chung-Piaw Teo, Zhichao Zheng, Distributionally robust mixed integer linear programs: Persistency models with applications, European Journal of Operational Research, 2014, 233(3):459–473 [pdf web]

15. Qingxia Kong, Chung-Yee Lee, Chung-Piaw Teo, Zhichao Zheng, Scheduling arrivals to a stochastic service delivery system using copositive cones, Operations Research, 2013, 61(3):711–726 [pdf web]

16. Karthik Natarajan, Chung-Piaw Teo, Zhichao Zheng, Mixed 0-1 linear programs under objective uncertainty: A completely positive representation, Operations Research, 2011, 59(3):713–728 [pdf web]

Medical and Public Health Journals

17. Yan He, Qian Luo, Hai Wang, Zhichao Zheng, Haidong Luo, Oon-Cheong Ooi, Real-time estimated SOFA score with intervals: Improved early warning with estimated uncertainty in patient condition, accepted for publication at Health Information Science and Systems

18. Yue Tang, Houyuan Jiang, Jingui Xie, Zhichao Zheng, Chui Yee Loke, Bee Keow Goh, Behavioral factors associated with patients’ non-attendance: A retrospective study in an outpatient specialty clinic at a women’s and children’s hospital in Singapore, International Journal of Healthcare Management, 2024, 17(4): 651–659 [web]

19. Wenyu Zhao, Jingui Xie, Zhichao Zheng, Han Zhou, Oon Cheong Ooi, Haidong Luo, Associations between HbA1c and deep sternal wound infection after coronary artery bypass: A systematic review and meta-analysis, Journal of Cardiothoracic Surgery, 2024, 19:51 [web]

20. Mairehaba Maimaitiming, Jingui Xie, Zhichao Zheng, Yongjian Zhu, Effect of the announcement of human-to-human transmission on teleconsultation services in China during COVID-19, Disaster Medicine and Public Health Preparedness, 2022, 17:e311 [web]

21. Mairehaba Maimaitiming, Chenxiao Zhang, Jingui Xie, Zhichao Zheng, Haidong Luo, Oon Cheong Ooi, Impact of restrictive transfusion strategy on thrombosis-related events: A meta-analysis and systematic review, Vox Sanguinis, 2022, 177(7): 887–899 [web]

22. Wenyu Zhao, Yongjian Zhu, Jingui Xie, Zhichao Zheng, Haidong Luo, Oon Cheong Ooi, The moderating effect of solar radiation on the association between human mobility and COVID-19 infection in Europe, Environmental Science and Pollution Research, 2022, 29(1):828–835 [web]

23. Han Zhou, Jingui Xie, Zhichao Zheng, Haidong Luo, Oon-Cheong Ooi, Effect of renin-angiotensin system inhibitors on acute kidney injury among patients undergoing cardiac surgery: A review and meta-analysis, Seminars in Thoracic and Cardiovascular Surgery, 2021, 33(4):1014–1022 [web]

24. Yuchong Zhang, Hai Wang, Zhichao Zheng, Haidong Luo, Oon-Cheong Ooi, Validation of prognostic accuracy of the SOFA score, SIRS criteria, and qSOFA score for in-hospital mortality among cardiac-, thoracic-, and vascular-surgery patients admitted to a cardiothoracic intensive care unit, Journal of Cardiac Surgery, 2020, 35(1):118–127 [web]

25. Lei Wang, Yan-Bo Zeng, Jia-Yun Chen, Qian Luo, Rowan Wang, Ruijie Zhang, Zhichao Zheng, Yuan-Hang Dong, Wen-Bin Zou, Xiaoqing Xie, Yi-Qi Du, Zhao-Shen Li, A simple new scoring system for predicting the mortality of severe acute pancreatitis: A retrospective clinical study, Medicine, 2020, 99(23):e20646 [web]

26. Jingui Xie, Guang Cheng, Zhichao Zheng, Haidong Luo, Oon-Cheong Ooi, To extubate or not to extubate: Risk factors for extubation failure and deterioration with further mechanical ventilation, Journal of Cardiac Surgery, 2019, 34(10):1004–1011 [web]

Working Papers

1. Yunchao Xu, Karthik Natarajan, Chung-Piaw Teo, Zhichao Zheng, Tracking-error models for multiple benchmarks: Theory and empirical performance, revise and resubmit for 4th round of review at Operations Research [pdf]

2. Xiaodong Wang, Yongjian Zhu, Sarah Yini Gao, Zhichao Zheng, Shao Wei Lam, Screening process information matters more than clinical information: A randomized controlled trial of information sharing on cancer screening decision,  revise and resubmit for 2nd round review at Manufacturing & Service Operations Management [pdf]

3. Yongjian Zhu, Jingui Xie, Yugang Yu, Zhichao Zheng, Haidong Luo, Oon Cheong Ooi, Spear and Shield: Can Outdoor Air Pollution Penetrate the Intensive Care Unit’s Defense? under review [pdf]

4. Qian Luo, Yan He, Hai Wang, Zhichao Zheng, Haidong Luo, Oon-Cheong Ooi, Estimating patient health transition from data censored by treatment-effect-based policies, in preparation

5. Jing Li, Mable C. Chou, Ming Dong, Zhichao Zheng, Optimizing colorectal cancer screening programs using a combination of faecal immunochemical tests and colonoscopy, in preparation

6. Qingxia Kong, Chung-Piaw Teo, Zhichao Zheng, Appointment scheduling with unpunctual patient arrivals, in preparation

7. Han Zhou, Jiayi Liu, Jingui Xie, Zhichao Zheng, Kollengode Ramanathan, Haidong Luo, Theodoros Kofidis, Graeme MacLaren, Oon-Cheong Ooi, Efficacy of renal replacement therapy for critically ill patients with acute kidney injury: From propensity score matching to bivariate probit model for multicenter observational study, under review

8. Yan He, Qian Luo, Hai Wang, Zhichao Zheng, A predictive and prescriptive method to reduce repetitive diagnostic tests using real-time monitoring data for timely detection and treatment, in preparation

9. Nicholas Yeo, Yan He, Sarah Yini Gao, Zhichao Zheng, On the adherence of colorectal cancer screening policies: A survey study in Singapore, in preparation

Conference Papers

1. Arnd Schirrmann, Elaine Wong, Zhichao Zheng, Exploiting mataheuristics to strategize on performance-based logistics contracts for MRO services, 24th European Conference on Operational Research, Lisbon, Portugal, July 11–14, 2010 [pdf]

Research Students

1. Yan He, PhD in Business (Operations Management)
   First Position: Data Scientist, Biofourmis

Research Grants

1. PI, Optimal personalized medical intervention using predictive information in ICUs, Academic Research Fund (AcRF) Tier 2, Ministry of Education, Singapore, Fund No. MOE2019-T2-1-185, January 2020–June 2023, SGD620,532

2. Co-PI, On the design of customized colorectal cancer screening policies to improve screening guideline compliance, Academic Research Fund (AcRF) Tier 1, Ministry of Education, Singapore, Fund No. C207MSS18B015, September 2018–August 2021, SGD74,945

3. PI, Predictive data analytics and real-time risk monitoring for intensive care units, Academic Research Fund (AcRF) Tier 1, Ministry of Education, Singapore, Fund No. C207MSS16B016, April 2017–March 2020, SGD149,710

Research Projects

1. Ministry of Health (MOH): Evaluating the Impact of Healthier SG on Downstream Healthcare Capacity, 2022-present

2. Zuellig Pharma: Assessing the Efficacy of Blockchain Integration in the Pharmaceutical Supply Chain, 2022-present

3. Singapore Health Services (SingHealth): Balancing Early Detection and Resource Utilization in Colorectal Cancer Screening, 2019–present

4. National University Heart Centre, Singapore (NUHCS): Predictive and Prescriptive Analytics for Managing Intensive Care Units, 2016–present

5. KK Women's and Children's Hospital (KKH): Appointment System Design to Reduce Patient No-Shows, 2014–present

6. National University Hospital (NUH): Patient Flow and Queue in Medicine Clinic, 2014–2015

7. EADS Innovation Works (Airbus Group Innovations-Singapore): Performance-Based Contracting and Spare Parts Management for Aircraft Maintenance Repair and Overhaul (MRO) Service, 2009–2012

8. SingTel: Pricing Simulator for Corporate Business Marketing, 2010–2011

9. National University Hospital (NUH): Workforce Scheduling with Electronic Prescriptions in the Outpatient Pharmacy, 2009–2010

Editorial Board

1. Associate Editor, Management Science, 2024–present

2. Associate Editor, Service Science, 2024–present

3. Guest Associate Editor, Management Science, Special Issue in Data-Driven Prescriptive Analytics, 2018–2022

4. Associate Editor, Journal of Management Science and Engineering (international version of Journal of Management Sciences in China 管理科学学报), 2016–present

Ad Hoc Reviewers (Alphabetical Order)

1. Annals of Operations Research

2. Decision Sciences

3. European Journal of Operational Research

4. IEEE Transactions on Automation Science and Engineering

5. IISE Transactions

6. Information Systems Research

7. INFORMS Journal of Computing

8. INFORMS Journal on Optimization

9. Journal of Industrial and Management Optimization

10. Journal of Modelling in Management

11. Journal of Systems Science and Systems Engineering

12. Management Science

13. Manufacturing & Service Operations Management

14. Naval Research Logistics

15. Omega

16. Operations Research

17. Proceedings of Singapore Healthcare

18. Production and Operations Management

Professional Experience

1. Visiting Professor, School of Economics and Management, Fuzhou University, May to June 2024

2. Visiting Professor, School of Business Administration, South China University of Technology, January 2024

3. Visiting Professor, School of Management, Jinan University, January 2024

4. Visiting Professor, School of Economics and Management, Fuzhou University, December 2023

5. Visiting Professor, School of Management Science and Engineering, Southwestern University of Finance and Economics, December 2023

6. Visiting Professor, School of Economics and Management, University of Electronic Science and Technology of China , December 2023

7. Visiting Professor, Department of Industril Engineering / Center for Statistical Science, Tsinghua University, November 2023

8. Visiting Professor, College of Engineering, Peking University, November 2023

9. Visiting Professor, School of Management Science and Engineering, Southwestern University of Finance and Economics, June 2019

10. Visiting Professor, School of Statistics, Southwestern University of Finance and Economics, July, 2019

11. Visiting Professor, College of Business, City University of Hong Kong, March 2017

12. Visiting Professor, School of Management, University of Science and Technology of China, July 2016

13. Visiting Professor, School of Business Administration, South China University of Technology, January 2016

14. Visiting Professor, School of Management, University of Science and Technology of China, May 2014

15. Visiting Professor, Department of Industrial Engineering and Logistics Management, Hong Kong University of Science and Technology, February to March 2014

16. Visiting Professor, School of Business, Universidad Adolfo Ibáñez, January 2014

17. Visiting Scholar, Department of Industrial Engineering and Logistics Management, Hong Kong University of Science and Technology, March 2012

Professional Service

1. Judge, POMS-HK Best Student Paper Competition, 2025

2. Judge, INFORMS JFIG Paper Competition, 2024

3. Session Chair, Healthcare Analytics, Annual International Conference of CSAMSE, Xiamen, Fujian, China, 2024

4. Co-Chair, MSOM Healthcare SIG Day, Minneapolis, Minnesota, U.S.A., 2024

5. Judge, POMS Best Healthcare Paper Competition, 2024

6. Session Chair, Healthcare Analytics, INFORMS Annual Meeting, Phoenix, Arizona, U.S.A., 2023

7. Judge, CSAMSE Best Paper Competition, 2023

8. Session Co-Chair, Healthcare Analytics, INFORMS Healthcare Conference, Toronto, Ontario, Canada, 2023

9. Judge, POMS Best Healthcare Paper Competition, 2023

10. Discussant, MSOM Healthcare SIG Day, Munich, Germany, 2022

11. Reviewer, MSOM Healthcare SIG Day, Munich, Germany, 2022

12. Reviewer, Hong Kong Research Grants Council, 2022

13. Judge, INFORMS HAS Student Paper Competition, 2021

14. Reviewer, MSOM Healthcare SIG Day, Alberta, Canada, 2020

15. Session Chair, Recent Development in Theories of Distributionally Robust Optimization, Berlin, Germany, 2019

16. Session Chair, Recent Development in Applications of Distributionally Robust Optimization, Berlin, Germany, 2019

17. Session Co-Chair, Health Analytics and Operations Management, INFORMS Healthcare Conference, Cambridge, Massachusetts, U.S.A., 2019

18. Reviewer, MSOM Healthcare Operations Management Special Interest Group Workshop, Singapore, 2019

19. Session Co-Chair, Inpatient Management, POMS Annual Conference, Washington D.C., U.S.A., 2019

20. Judge, POMS-HK Best Student Paper Competition, 2019

21. Session Co-chair, Healthcare Data Analytics, POMS-HK International Conference, Hong Kong, China Hong Kong, China, 2019

22. Session Chair, Distributionally Robust Optimization - New Theory and Applications, International Symposium on Mathematical Programming, Bordeaux, France, 2018

23. Session Chair, Healthcare Analytics and Operations Management, INFORMS International Meeting, Taipei, Taiwan, 2018

24. Judge, POMS-HK Best Student Paper Competition, 2018

25. Judge, POMS-HK Best Student Paper Competition, 2017

26. Session Chair, Behavioral Operations Research, The Ninth Annual International Conference of CSAMSE, Hefei, Anhui, China, 2016

27. Session Chair, Recent Advances and Applications of Robust Optimization, INFORMS International Meeting, Waikoloa, Hawaii, U.S.A., 2016

28. Session Chair, Decision Making for Colorectal Cancer Screening and Treatment, INFORMS International Meeting, Waikoloa, Hawaii, U.S.A., 2016

29. Session Chair, Sharing Economy and Operations, POMS Annual Conference, Orlando, Florida, U.S.A., 2016

30. Session Chair, Healthcare Appointment Scheduling, POMS-HK International Conference, Macau, China, 2016

31. Session Chair, Scheduling and Operations Management in Healthcare, POMS International Conference, Singapore, 2014

32. Session Chair, Integer Programming Applications, INFORMS Annual Meeting, Phoenix, Arizona, U.S.A., 2012

33. Session Co-chair, Healthcare Operations: Appointment Scheduling, POMS Annual Conference, Chicago, Illinois, U.S.A., 2012