Fig. 4From: Introducing fairness in Norwegian air ambulance base location planningOptimal base locations when relocating one or two bases compared to the existing base structure for a 45 min threshold, using different objective functions. Utility is defined as the probability that a HEMS departing from the nearest base reaches the patient on time; green means an inhabitant may expect HEMS to always be on time; yellow means inhabitants should expect on-time arrival in 50% of the cases, and red 0% of casesBack to article page