Ambulance Location Problem to Minimize the Number of Ambulances, Expected Response Time and Probability of Lost Customer Demand

  • سال انتشار: 1400
  • محل انتشار: چهاردهمین کنفرانس بین المللی انجمن ایرانی تحقیق در عملیات
  • کد COI اختصاصی: ICIORS14_167
  • زبان مقاله: انگلیسی
  • تعداد مشاهده: 338
دانلود فایل این مقاله

نویسندگان

Arash Motaghedi-Larijani

Department of Industrial Engineering, West Tehran Branch Islamic Azad University, Tehran, Iran

چکیده

Ambulance emergency systems in urban areas should have the fastest possible response time because delays in service delivery may result in death or serious injury to the patient. There are some locations that ambulances can locate them to cover customers' demand. Each customer point should be served by an assigned ambulance. There is a hospital that has several backup ambulances to cover customer's demands that have not been served. If the assigned ambulance is busy, the customer should be served by a backup ambulance of the hospital. According to the problem, two queuing systems are presented to employ for this problem. Customers call to the emergency center with an exponential distribution function. The service time ambulance is included the travel time from origin to destination, the stopping time of in the customer location, and the return time. A three-objective mathematical model is developed with objective functions of minimizing the number of ambulances, response time and lost demand to locate ambulances and allocate ambulances to customers. In this study, the expected response time of the emergency center and the probability of customers' demand lost is computed. Since the proposed problem is NP-hard, to solve the problem, NSGA-II algorithm is employed.

کلیدواژه ها

Facility Location, Queuing System, NSGA-II, Multi-objective, Integer Programming

مقالات مرتبط جدید

اطلاعات بیشتر در مورد COI

COI مخفف عبارت CIVILICA Object Identifier به معنی شناسه سیویلیکا برای اسناد است. COI کدی است که مطابق محل انتشار، به مقالات کنفرانسها و ژورنالهای داخل کشور به هنگام نمایه سازی بر روی پایگاه استنادی سیویلیکا اختصاص می یابد.

کد COI به مفهوم کد ملی اسناد نمایه شده در سیویلیکا است و کدی یکتا و ثابت است و به همین دلیل همواره قابلیت استناد و پیگیری دارد.