Open Access
2015 On patient flow in hospitals: A data-based queueing-science perspective
Mor Armony, Shlomo Israelit, Avishai Mandelbaum, Yariv N. Marmor, Yulia Tseytlin, Galit B. Yom-Tov
Stoch. Syst. 5(1): 146-194 (2015). DOI: 10.1214/14-SSY153


Hospitals are complex systems with essential societal benefits and huge mounting costs. These costs are exacerbated by inefficiencies in hospital processes, which are often manifested by congestion and long delays in patient care. Thus, a queueing-network view of patient flow in hospitals is natural for studying and improving its performance. The goal of our research is to explore patient flow data through the lens of a queueing scientist. The means is exploratory data analysis (EDA) in a large Israeli hospital, which reveals important features that are not readily explainable by existing models.

Questions raised by our EDA include: Can a simple (parsimonious) queueing model usefully capture the complex operational reality of the Emergency Department (ED)? What time scales and operational regimes are relevant for modeling patient length of stay in the Internal Wards (IWs)? How do protocols of patient transfer between the ED and the IWs influence patient delay, workload division and fairness? EDA also underscores the importance of an integrative view of hospital units by, for example, relating ED bottlenecks to IW physician protocols. The significance of such questions and our related findings raise the need for novel queueing models and theory, which we present here as research opportunities.

Hospital data, and specifically patient flow data at the level of the individual patient, is increasingly collected but is typically confidential and/or proprietary. We have been fortunate to partner with a hospital that allowed us to open up its data for everyone to access. This enables reproducibility of our findings, through a user-friendly platform that is accessible via the Technion SEELab.


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Mor Armony. Shlomo Israelit. Avishai Mandelbaum. Yariv N. Marmor. Yulia Tseytlin. Galit B. Yom-Tov. "On patient flow in hospitals: A data-based queueing-science perspective." Stoch. Syst. 5 (1) 146 - 194, 2015.


Received: 1 June 2014; Published: 2015
First available in Project Euclid: 23 December 2015

zbMATH: 1359.60116
MathSciNet: MR3442392
Digital Object Identifier: 10.1214/14-SSY153

Keywords: EDA , emergency departments , event logs , healthcare , hospital wards , patient flow , Queueing models , Queueing networks

Rights: Copyright © 2015 INFORMS Applied Probability Society

Vol.5 • No. 1 • 2015
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