IJE TRANSACTIONS B: Applications Vol. 32, No. 2 (February 2019) 296-305    Article in Press

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I. Seyedi, M. Hamedi and R. Tavakkoli-Moghaddam
( Received: November 09, 2018 – Accepted in Revised Form: January 03, 2019 )

Abstract    Nowadays, one of the major goals of the distribution environment is to reduce lead times and inventories. Cross-docking is a logistics technique which removes the storage and picking up the functions of a warehouse. The term cross-docking refers to moving products directly from incoming to outgoing trailers with little or no storage in between. According to the recent related papers, the truck scheduling problem is one of the objectives for cross-docking systems which is divided into smaller parts. The first stage is about the assignment of the trucks to the dock doors while the second stage aims to sequence all inbound and outbound trucks, in an effective way. Therefore, for dealing with the truck scheduling problem in a cross-docking system, this paper develops five heuristics. The obtained results are compared with those from the previous works. We use many test problems in the literature that were created in different sizes to study the performance of the novel heuristics. In small and medium dimensions the minimum value which found is related to one of the methods CDH3 (Cross Dock Heuristic) which has been proposed in this paper beside in all scales the method CDH4 is the best among others. The numerical results show that the developed heuristics are able to find quick good solutions with fast convergence.


Keywords    Cross docking, Scheduling, Optimization, Heuristic



امروزه یکی از مهمترین اهداف محیط های توزیع، کاهش زمان انجام کار و موجودی کالا است. سیستم انبار های متقاطع یک روش تدارکاتی است که عملیات ذخیره سازی و برداشت کالا از انبار را حذف می کند. اصطلاح انبار های متقاطع اشاره به انتقال مستقیم محصولات از کامیونهای ورودی به کامیون های خروجی با کمترین و یا بدون ذخیره سازی آنها است. با توجه به مقالات اخیر این حوزه، یکی از اهداف سیستم های انبار متقاطع، مسئله برنامه ریزی کامیون است که به دو بخش تخصیص کامیون ها به درب های بارگیری و ترتیب کامیون های ورودی و خروجی تقسیم می شود. بنابراین، برای حل مسئله برنامه ریزی کامیون ها در یک سیستم انبار متقاطع، این مقاله پنج راه حل ابتکاری را ارائه می کند و نتایج حاصل از آنها با آنچه که در مقالات قبلی ارائه شده، مقایسه شده است. در این مقاله ما از مسائل نمونه موجود در ادبیات موضوع استفاده نمودیم که در ابعاد کوچک، متوسط و بزرگ برای آزمایش تاثیر روش های ابتکاری جدید تولید شده اند. در ابعاد کوچک و متوسط حداقل مقداری که بدست آمده است مربوط به CDH3 است که یکی از روش هایی است که در این مقاله پیشنهاد شده است. علاوه بر این در همه مقیاس ها نیز روش CDH4 بهترین در میان دیگران است. نتایج عددی نشان می دهد که روش های ابتکاری توسعه یافته در این مقاله می توانند پاسخ های خوب با همگرایی سریع پیدا کنند.


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