Online algorithms for ambulance routing in disaster response with time-varying victim conditions

Davood Shiri (), Vahid Akbari () and F. Sibel Salman ()
Additional contact information
Davood Shiri: Sheffield University Management School, University of Sheffield
Vahid Akbari: Nottingham University Business School, University of Nottingham, Jubilee Campus
F. Sibel Salman: Koç University

OR Spectrum: Quantitative Approaches in Management, 2024, vol. 46, issue 3, No 5, 785-819

Abstract: Abstract We present a novel online optimization approach to tackle the ambulance routing problem on a road network, specifically designed to handle uncertainties in travel times, triage levels, required treatment times of victims, and potential changes in victim conditions in post-disaster scenarios. We assume that this information can be learned incrementally online while the ambulances get to the scene. We analyze this problem using the competitive ratio criterion and demonstrate that, when faced with a worst-case instance of this problem, neither deterministic nor randomized online solutions can attain a finite competitive ratio. Subsequently, we present a variety of innovative online heuristics to address this problem which can operate with very low computational running times. We assess the effectiveness of our online solutions by comparing them with each other and with offline solutions derived from complete information. Our analysis involves examining instances from existing literature as well as newly generated large-sized instances. One of our algorithms demonstrates superior performance when compared to the others, achieving experimental competitive ratios that closely approach the optimal ratio of one.

Keywords: Disaster relief; Ambulance routing; Online optimization; Competitive ratio (search for similar items in EconPapers)
Date: 2024
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Citations: View citations in EconPapers (1)

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DOI: 10.1007/s00291-024-00744-4

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