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… The conference is intended as a meeting place for researchers, users and potential users of Operational Research, Statistics, Computer Science and related fields. It will provide managers, practitioners, and researchers with a unique opportunity to exchange information on quantitative techniques for decision making. This year’s meeting will take place in Maastricht, the Netherlands, at Maastricht University School of Business and Economics, and will be organized by the department of Quantitative … Rotterdam School of Management C.J. Jagtenberg Vrije Universiteit Amsterdam, Operations Analytics R.D. van der Mei Centrum Wiskunde & Informatica, Stochastics Group Keywords: Health Care, Community First Responders, Emergency Medical Services, Nonlinear Integer Programming When medical emergencies occur, first aid must be provided in a timely manner. In general, the shorter the emergency response time the better the medical outcomes of patients. As a result, an important objective of the … differences. As volunteers are mainly valuable when they arrive before the ambulance, we moreover introduce a new measure for the effectiveness of CFR systems: the probability that at least one volunteer arrives before the ambulance. We present a Nonlinear Integer Program (NLIP) formulation of the optimization model and develop a solution approach that can efficiently obtain optimal solutions for instances of realistic size. To demonstrate the application of the introduced optimization model and …