بازطراحی شبکه زنجیره تأمین با در نظرگیری تصمیمات مسیریابی

نوع مقاله: مقاله پژوهشی

نویسندگان

1 کارشناسی ارشد، دانشکده مهندسی صنایع، پردیس دانشکده‌‌های فنی، دانشگاه تهران، تهران، ایران

2 استادیار، دانشکده مهندسی صنایع، پردیس دانشکده‌های فنی، دانشگاه تهران، تهران، ایران

چکیده

با توجه به وجود تغییرات در شرایط هر زنجیره تأمین، امکان نابهینه شدن طراحی‎های اولیه شبکه‎های زنجیره تأمین وجود دارد. این تغییرات می‎تواند به دلایل گوناگونی مانند تغییر در مقدار یا مکان تقاضا، تغییر در تأمین‎کنندگان، هزینه ها، مالیات‏ها و قوانین دولتی باشد. بنابراین برای منطبق شدن با شرایط جدید لازم است با طراحی مجدد شبکه‎ها به شکل بهینه جدید آن‌ها دست یابیم. این مقاله یک مدل ریاضی جدید برای مسئله طراحی مجدد زنجیره تأمین ارائه می‎کند. با توجه به اینکه حمل‎ونقل محصولات یکی از مشکلات اصلی نمونه‎های دنیای واقعی است، محدودیت‎های مسیریابی در هر سطح زنجیره در مدل در نظر گرفته شده‎اند. همچنین یک ناوگان حمل‎ونقل ناهمگن و دارای ظرفیت مشخص در یک سیستم ارسال گسسته‎ تقاضا، به ارضای تقاضای انبارها در سطح اول و ارضای تقاضای مشتریان در سطح دوم می‎کند. علاوه بر این به دلیل وجود محدودیت در ظرفیت تولید کارخانجات زنجیره، بخشی از تقاضا که بیشتر از ظرفیت تولید است از طریق برون‎سپاری تأمین می‎شود. تقاضای برون‎سپاری شده به طور مستقیم به انبار منتقل می‎شود. مدل از طریق یک مثال عددی صحت‎سنجی شده و با تحلیل میزان حساسیت مدل نسبت به برخی پارامترها تغییرات حاصل بر روی هزینه و شکل جدید زنجیره مورد بررسی قرار می‌گیرد.

کلیدواژه‌ها


عنوان مقاله [English]

Supply Chain Redesign with Routing Consideration

نویسندگان [English]

  • Zahra Azadehranjbar 1
  • Ali Bozorgi-Amiri 2
1 Masters of Science, School of Industrial Engineering, College of Engineering, University of Tehran, Tehran, Iran
2 Assistant Professor, School of Industrial Engineering, College of Engineering, University of Tehran, Tehran, Iran
چکیده [English]

Due to the changes in the condition of every supply chain it is possible that the first optimal network design become inefficient .These changes can be caused by different reasons like changes in amounts or location of demands, changes in suppliers, costs, taxes, government regulations etc. So, it is necessary to redesign networks to obtain their new optimal configuration for adopting to new conditions. This paper proposes a new mathematical model for a multi-product supply chain network redesign problem. Since one of the main problems of real-world cases deals with is transportation, routing constraints in every echelon (plant to warehouse and warehouse to customer) are considered in the proposed model. In addition, a capacitated and heterogeneous fleet of transportation in a split delivery system is used to deliver demands of the first echelon to the warehouses and demands of the second echelon to customers. On the other hand, due to the production capacity of the manufacturers, some portions of demands is satisfied by outsourcing. The outsourced products are moved to the warehouses directly. The proposed model is validated through an illustrative example by some strong servers in a website which is used to solve the mathematical modeling problems. Then, some sensitive analysis are performed in order to investigate the effects of some key parameters on the optimal cost and figure of the network. Finally, we can reach the conclusion of need to consider the transportation and routing costs, and it is necessary to account outsourcing and some other costs and benefits in our redesign problems as well.

کلیدواژه‌ها [English]

  • Supply chain network redesign
  • Routing
  • Outsourcing
  • Split delivery

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