Volume 6, Issue 4 (Summer - In press 2021)                   HDQ 2021, 6(4): 0-0 | Back to browse issues page


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Mahmoudi H, Pishvaei M, Saberian P, Slogan M. Presenting a Multi-Objective Location Model in GIS Environment (Case Study: East Tehran Emergency Stations). HDQ. 2021; 6 (4)
URL: http://hdq.uswr.ac.ir/article-1-357-en.html
1- Department of Industrial Management, Islamic Azad University, North Tehran Branch, Tehran, Iran.
2- Department of Industrial Engineering, Iran University of Science and Technology, Tehran, Iran. , pishvaee@iust.ac.ir
3- Department of Anesthesiology and Pain, Imam Khomeini Hospital Complex, Tehran University of Medical Sciences, Tehran, Iran.
Abstract:   (98 Views)
Introduction: The purpose of this study is to provide a multi-objective location model for emergency relief bases to maximize coverage and minimize costs, which reduces mortality by increasing the efficiency of relief services.
Materials and Methods: Based on the ambulance distribution process in East Tehran and based on statistical information on demand (at least 30 samples for data normalization) in the last six months of 2018, a definitive mathematical model was introduced and after evaluating the model, using GAMS software was implemented.  Using studies, previous, and interviews, key and effective indicators of location were identified, which are: easy access, location in high demand, location in an urban area, and location in a distance not too close to another emergency.  These factors were then prioritized using the hierarchical method, and the output obtained from this work indicates the high weight of the factor of “being in a place with high demand”.  The objective functions are to maximize coverage and minimize costs and equity in relief time.  To deal with the uncertainty of the parameters, the robust optimization approach, initially the selection of potential proposed sites for the establishment of the database, GIS was used.  To clarify the application of the above mathematical model in the real world, a case study was conducted in the East.
Findings and Conclusion: Based on the designed model and scientific location, the initial points proposed by GIS were identified.  Then, with the construction of the base in the final points of the initially proposed places, it was possible to increase the number of stations in East Tehran from 27 to 34 bases.  To manage costs, provide the highest level of coverage and reduce the maximum relief time at stations to 8 minutes.
     
Type of Study: Applicable | Subject: Special
Received: 2021/04/24 | Accepted: 2021/07/17 | Published: 2021/07/19

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