scholarly journals Impact of COVID-19 Epidemics on Bed Requirements in a Healthcare Center Using Data-Driven Discrete-Event Simulation

Author(s):  
Jules Le Lay ◽  
Vincent Augusto ◽  
Xiaolan Xie ◽  
Edgar Alfonso-Lizarazo ◽  
Bienvenu Bongue ◽  
...  
Author(s):  
Woo-Kyun Jung ◽  
Hyungjung Kim ◽  
Young-Chul Park ◽  
Jae-Won Lee ◽  
Eun Suk Suh

2021 ◽  
Author(s):  
Ye Chen ◽  
Nikola Marković ◽  
Ilya O. Ryzhov ◽  
Paul Schonfeld

Using Data to Allocate Resources Efficiently In city logistics systems, a fleet of vehicles is divided between service regions that function autonomously. Each region finds optimal routes for its own fleet and incurs costs accordingly. More vehicles lead to lower costs, but the trade-off is that fewer vehicles are left for other regions. Costs are difficult to quantify precisely because of demand uncertainty but can be estimated using data. The paper “Data-driven robust resource allocation with monotonic cost functions” by Chen, Marković, Ryzhov, and Schonfeld develops a principled risk-averse approach for two-stage resource allocation. The authors propose a new uncertainty model for decreasing cost functions and show how it can be leveraged to efficiently find resource allocations that demonstrably reduce the frequency of high-cost scenarios. This framework combines statistics and optimization in a novel way and is applicable to a general class of resource allocation problems, encompassing facility location, vehicle routing, and discrete-event simulation.


Author(s):  
Shabboo Valipoor ◽  
Mohsen Hatami ◽  
Hesamedin Hakimjavadi ◽  
Elif Akçalı ◽  
Wendy A. Swan ◽  
...  

Objective: To address prolonged lengths of stay (LOS) in a Level 1 trauma center, we examined the impact of implementing two data-driven strategies with a focus on the physical environment. Background: Crowding in emergency departments (EDs) is a widely reported problem leading to increased service times and patients leaving without being seen. Methods: Using ED historical data and expert estimates, we created a discrete-event simulation model. We analyzed the likely impact of initiating care and boarding patients in the hallway (hallway care) instead of the exam rooms and adding a dedicated triage space for patients who arrive by emergency medical services (EMS triage) to decrease hallway congestion. The scenarios were compared in terms of LOS, time spent in exam rooms and hallway spaces, service time, blocked time, and utilization rate. Results: The hallway care scenario resulted in significantly lower LOS and exam room time only for EMS patients but when implemented along with the EMS triage scenario, a significantly lower LOS and exam room time was observed for all patients (EMS and walk-in). The combination of two simulated scenarios resulted in significant improvements in other flow metrics as well. Conclusions: Our findings discourage boarding of admitted patients in ED exam rooms. If space limitations require that admitted patients be placed in ED hallways, designers and planners should consider enabling hallway spaces with features recommended in this article. Alternative locations for boarding should be prioritized in or out of the ED. Our findings also encourage establishing a triage area dedicated to EMS patients in the ED.


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