نویسندگان

1 دانشکده مهندسی صنایع، پردیس دانشکده‌های فنی، دانشگاه تهران، تهران

2 دانشکده مهندسی صنایع، دانشگاه علم و صنعت ایران ، تهران

چکیده

در دهه‌های اخیر، مواد خام و منابع از جمله موضوع‌های قابل توجه محققان بود‌ه‌اند، به‌عبارت دیگر، نقش مهمی در صنایع تولیدی و یا سازمان‌های خدماتی دارند. از سوی دیگر، جمعیت هر روز افزایش می‌یابد و افزایش جمعیت به‌معنی افزایش تقاضا برای کالاها یا خدمات است. بنابراین لازم است که منابع بیشتری برای ارائه خدمات یا کالاها مصرف شود. به‌همین دلیل، سازمان‌های دولتی و آژانس‌های محیط زیستی، به وضع و اجرای قوانین سخت‌گیرانه نسبت به تولیدکنندگان و خدمت‌دهندگانی که باعث ضربه‌‌زدن بیش از حد مجاز به محیط زیست هستند، اقدام کرد‌ه‌اند که در پار‌ه‌ای موارد استفاده از منابع را برای آنها محدود می‌کند. در این میان زنجیره تأمین به یکی از ‌مسئله‌های مهم که ‌تأثیر بسیاری از این موضوع می‌پذیرد، تبدیل شده است. در این تحقیق، زنجیره تأمین حلقه بسته با توجه به عدم اطمینان، اختلالات و هزینه تولید نیز مدل‌سازی شده است. هدف از این ‌مسئله، به حداقل رساندن هزینه سیستم مورد نظر بر اساس تصمیمات مکان، میزان جریان بین سطوح و فروش از دست رفته است. روش حل آزادسازی لاگرانژی برای حل این مسئله NP-hard استفاده شده است. در پایان، از یک مثال عددی برای آزمایش مدل و روش حل پیشنهادی استفاده شده است. نتایج نشان می‌دهد که زمان اجرای ‌مسئله در مقیاس بزرگ با GAMS نسبت به روش پبشنهادی بالاتر است.

کلیدواژه‌ها

عنوان مقاله [English]

Designing a Closed Loop Supply Chain Network Considering the Supplier Disorder Risk and Production Time

نویسندگان [English]

  • M. Rabbani 1
  • E. Asgaari 1
  • A. Ghavamifar 2
  • H. Farrokhi-Asl 2

چکیده [English]

In the recent decades, raw materials and resources have been remarkable issues for researchers; in other words, they play an important role in manufacturing industries or service organizations. On the other hand, the population is increasing every day. An increase in the population means the increased demand for goods or services. Therefore, more resources are needed to deliver services or goods. For this reason, government agencies and environmental agencies have developed and enforced stringent laws against producers and service providers who have exceeded the permissible limits for the environment; in some cases, the use of resources has been even restricted. In the meantime, the supply chain has become one of the major issues that can greatly influence this issue. In this research, the supply chain of the closed loop has been modeled due to uncertainty, disturbances and cost of production. The purpose of this problem has been to minimize the cost of the system in question based on the location decisions, and flow rates between levels and sales. The Lagrangian liberation solution method is used to solve this NP-hard problem. In the end, a numerical example has been employed to test the model and the proposed solution method. The results show that the time of implementation of the large-scale problem with GAMS is higher than that of the proposed method.

کلیدواژه‌ها [English]

  • Closed loop supply chain
  • Disruption
  • Risk
  • Lagrangian relaxatio
  • Uncertainty
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