Derya Demirtas


University of Twente
Faculty of Behavioural, Management and Social Sciences
Dep. Industrial Engineering and Business Information Systems
Center for Healthcare Operations Improvement & Research
P.O. Box 217
7500 AE Enschede
The Netherlands

Room: RA 3420 (Ravelijn)
Tel: (+31 53 489) 3184
E-mail: d.demirtas(a)


Derya Demirtas is an assistant professor at the Center for Healthcare Operations Improvement & Research (CHOIR) in the Department of Industrial Engineering and Business Information Systems at the University of Twente.

She received her BSc in Industrial Engineering with a double major in Computer Engineering from the Middle East Technical University, Turkey (2008). She then received her MMath in Combinatorics & Optimization from the University of Waterloo, Canada (2010), and her PhD in Industrial Engineering from the University of Toronto, Canada (2016). She was recognized by the American Heart Association with the Young Investigator Award in 2015. She won the best poster abstract presentation award by the National Association of EMS Physicians (NAEMSP) in 2016. She was a finalist for the Three Minute Thesis Competition at the University of Toronto (2014). She also received the second place in the INFORMS Section on Public Sector Operations Research (PSOR) best paper competition (2012).


Operations research, optimization, spatial data analytics and their applications in healthcare: in particular, linear and integer programming, facility location under uncertainty, covering problems, spatiotemporal trend analysis, public health resource planning and emergency service location problems.


The focus of Dr. Demirtas’s research is on data-driven decision making aimed at improving healthcare systems. Her most recent project is on optimizing the locations of public access defibrillators to improve survival from out-of-hospital cardiac arrest (OHCA). In this research, she develops mathematical optimization and spatial data analytics models to analyse the OHCA risk and to guide the deployment of automated external defibrillators (AEDs) in public settings


Journal Articles (Published) 

Journal Articles (Submitted)

  • Demirtas, D., Brooks, S.C., Morrison, L.J., Chan, T.C.Y. “Spatiotemporal Stability of Out-of-Hospital Cardiac Arrests”. Submitted.
  • Vieira, B., Demirtas, D., Van de Kamera, J.B, Hans, E.W., Van Harten, W. “A Mathematical Programming Model for Optimizing the Staff Allocation in Radiotherapy under Uncertain Demand”. Submitted.

Journal Articles (In Preparation)

  • Demirtas, D., Klumpp M.  “Aiming for a Moving Target: Changing Emergency Service Routing due to Telematics Applications”. In preparation.


  • Demirtas, D., “Facility Location under Uncertainty and Spatial Data Analytics in Healthcare”, PhD Thesis, University of Toronto, 2016.
  • Demirtas, D., “Worst-Case Complexity Analyses for the Dobson-Kalish Optimal Pricing Algorithm and its Relatives”, MMath Thesis, University of Waterloo, 2010.


  • Instructor, Industrial Engineering & Management Master’s Program (M-IEM) (2017)
    • Warehousing, 100 students, 5 ECs 
  • Instructor, Health Sciences Bachelor Program (B-GZW) (2016)
    • Operations Management (OM) in Healthcare (within Module 4: Optimization of Care), 50students, 3 ECs
    • OM Practicum (within Module 4), 50 students, 3 ECs
    • Project: Optimization of Healthcare Processes (within Module 4), 50 students, 1 EC

  • Guest Lecturer, MIE 258 Engineering Economics and Accounting, University of Toronto (2015)
  • Author, Case Study on Maximizing Team Diversity in a First-year Engineering Course, University of Toronto (2015)
  • Certificate in Prospective Professors in Training, University of Toronto (2014)
  • Guest Lecturer, MIE 468 Facility Planning, University of Toronto (2013)
  • Teaching Assistant, Dept. of Mechanical and Industrial Engineering, University of Toronto (2010 – 2015)
    • MIE 258 Engineering Economics and Accounting (2012 – 2015)
    • MIE 468 Facility Planning (2013, 2014)
    • MIE 562 Scheduling (2010)

  • Teaching Assistant, Division of Engineering Science, University of Toronto (2011)  
    • ESC 103 Engineering Mathematics and Computation

  • Teaching Assistant, Dept. of Combinatorics and Optimization, University of Waterloo (2008 – 2010)
    • Math 137 Calculus 1 for Honours Mathematics
    • Math 135 Algebra for Honours Mathematics
    • Math 116 Calculus 1 for Engineering
    • CO 350 Linear Optimization
    • CO 370 Deterministic OR Models
    • CO 227 Introduction to Optimization


  • Master’s Thesis Supervision, University of Twente
    • Healthcare logistics projects at AMC, Amsterdam; ZGT, Almelo; Sint Maartenskliniek, Nijmegen; St. Antonius Hospital, Utrecht; Rijnstate Hospital, Arnhem
    • Logisticsprojects at Albert Heijn
  • Master’s Capita Selecta Supervision, University of Twente
    • Healthcare logistics projects at University Medical Center (UMC) Utrecht.

  • Undergraduate (Bachelor) Thesis Supervision, University of Twente
    • Logistics projects at Victoria Hospital, London, Canada; Sint Maartenskliniek, Nijmegen; Acute Zorg Euregio, Enschede; Contour Covering Technology BV, Winterswijk


  • Member, Female Faculty Network Twente (FFNT) (2016 – present)
  • Member, EURO Working Group for Location Analysis (EWGLA) (2016 – present)
  • Member, Operational Research Applied to Health Services (ORAHS) (2013 – present)
  • Member, American Heart Association (AHA) (2015 – present)
  • Member, Institute for Operations Research and the Management Sciences (INFORMS) (2011 – present)
  • Member, Society for Industrial and Applied Mathematics (SIAM) (2010 – present)
  • Member, Canadian Operations Research Society (CORS) (2012 – 2015)
  • Trainee, CREATE Healthcare Operations & Information Management (2011 – 2014)
  • Trainee, INFORMS Future Academician Colloquium (2013)


  • Session Chair, INFORMS Healthcare 2017, Rotterdam (2017)
  • Organizer, Healthcare Operations Research Summer School in Twente (2017)
  • Organizer, 4th Intl. Workshop on Planning of Emergency Services (2017)
  • Member, OLC (Opleidingscommissie - Education Committee), TBK/IEM (2017)
  • Judge, Best Master Thesis Award, IEBIS, University of Twente (2016)
  • President, CORS/INFORMS Univ. of Toronto Student Chapter (2013 – 2014)
  • Invited Speaker, Question Maker and Marker, Toronto Operations Research Challenge (TORCH) (2014)
  • Vice-President, Univ. of Toronto Operations Research Group (UTORG) (2012 – 2013)
  • Organizing Committee Member, MIE Research Symposium, Toronto (2012)
  • Volunteer Tutor, Pathways to Education–Regent Park, Toronto (2012)