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The problem of excessive empty haul is a major problem in transportation planning. One of the solutions is to combine trips together to form a multi drop distribution. However, multi drop distribution planning is complicated and has to be efficiently managed. The objective of the vehicle routing wit...

وصف كامل

محفوظ في:
التفاصيل البيبلوغرافية
المؤلف الرئيسي: กิตติโชติ ตันติภนา
مؤلفون آخرون: มาโนช โลหเตปานนท์
التنسيق: Theses and Dissertations
اللغة:Thai
منشور في: จุฬาลงกรณ์มหาวิทยาลัย 2008
الموضوعات:
الوصول للمادة أونلاين:https://digiverse.chula.ac.th/Info/item/dc:44348
الوسوم: إضافة وسم
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المؤسسة: Chulalongkorn University
اللغة: Thai
الوصف
الملخص:The problem of excessive empty haul is a major problem in transportation planning. One of the solutions is to combine trips together to form a multi drop distribution. However, multi drop distribution planning is complicated and has to be efficiently managed. The objective of the vehicle routing with time windows (VRPTW) is to determine a set of feasible routings for goods delivery to a set of customers within prescribed time windows while minimizing cost. The routes must also satisfy time windows, truck capacity, and other operational constraints. We present a column generation based exact algorithm and an improvement heuristics for the problem based on an extension of Large-scale Neighborhood Search (LNS) and probability theory. The proposed algorithm can find near-optimal solutions within reasonable amount of computation time. The analysis of the model results indicate that the model can reduce the percentages of empty haul distance by approximately 68 percent to 72 percent comparing the truckload operation without empty haul management. Moreover, using the algorithm can reduce transportation cost by approximately 42 percent.