Improving organizational processes in healthcare through simulation-driven resource allocation: Methodology and real-world case study

The global rise in the aging population presents significant challenges to healthcare systems worldwide, which thus need more efficiency and effectiveness. Healthcare systems deliver services through processes that encode (inter)national regulations and protocols for patient treatment. It follows that efficiency and effectiveness require improvement of healthcare processes. This paper introduces a novel methodology leveraging process mining and simulation to improve healthcare organizational processes through data-driven resource allocation. Traditional qualitative analyses and queuing theory offer limited scope for complex, multi-activity processes. In contrast, process simulation enables process improvement but requires a realistic simulation model; otherwise, the analysis may optimize an assumed process rather than the real one. This paper reports on a data-driven simulation methodology that builds on process mining techniques: process mining puts aside the subjectivity of process actors and focuses on the objectivity of transactional data recorded by information systems. This enables us to discover process simulation models that mimic real behavior. Simulation models support process improvement through the evaluation of alternative what-if scenarios, which can be tested without disrupting live operations. The methodology has been applied to the emergency department of an Italian hospital, focusing on reducing patient waiting times. Simulations involving a careful addition of medical staff demonstrated a potential substantial reduction in waiting times (88%) with a modest cost increase (7%-8%). Furthermore, the improved process exhibited enhanced resilience to surges in patient arrivals, highlighting how improved processes guarantee higher preparedness in front of emergencies.