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论文大纲，目录 |
| 关键词搜索：Simulation less-than-truckload trucking service network design stochastic customer demand |
Thesis
Presented to xxx University College
in Partial Fulfillment
of the Requirements
for the Degree of
Master of Science in Logistics
Abstract
Service network design (SND) is a part of tactical planning activities of transportation companies. Less-than-truckload (LTL) trucking industry has been steadily expanding the market share in the past decades, due to its operational flexibility and high efficiency. In order to provide flexible and robust service schedule for LTL carriers, stochasticity is explicitly taken into account when formulating the SND problem.
Service schedules derived from the stochastic model shows structural difference with its deterministic counterparts. This research project develops a simulation model of an LTL network, in order to evaluate the system performance of the LTL network with the stochastic schedule. Several types of dispatching rules are incorporated into the simulated LTL network. A set of experiments show that the stochastic solution performs very well when it is confronted with random customer demands.
Furthermore, the stochastic schedule is much better than the deterministic one in terms of the proportion of undelivered commodities.
Key Words:
Simulation; less-than-truckload trucking; service network design; stochastic customer demand.
Contents
Preface ……………………………………………………………………………….. i
Abstract ……………………………………………………………………………… ii
Table of Contents …………………………………………………………………… iii
List of Tables ……无忧论文 【http://www.uklunwen.com】…………………………………………………………………... vi
List of Figures ……………………………………………………………………… vii
1.Introduction ……………………………………………………………………… 1
2.Less-than-truckload Trucking Industry ………………………………………….. 3
2.1Less-than-truckload Trucking ……………………………………………… 3
2.2The Physical Structure of LTL Network …………………………………… 4
3.Stochastic Service Network Design for LTL Trucking Carrier ………………….. 7
3.1Service Network Design ……………………………………………….…… 8
3.1.1 A Simplified Instance of Service Network …………………………….. 8
3.1.2 Load Plan and Consolidation ………………………………………….. 9
3.1.3 Four Major Decisions on Tactical Level …………………………....... 10
3.1.4 Static and Dynamic Models ……………………………………………11
3.2Service Network with Stochastic Demand ………………………………... 12
3.3Solution Characteristic of Stochastic Service Network Design ……………13
4. LTL Network Evaluation with Simulation ………………………………………. 15
4.1 Simulation Issues …………………………………………………………… 15
4.1.1 System and Model ……………………………………………………. 15
4.1.2 Model Validity and Analysis …………………………………………. 16
4.1.3 A Simulation as a Whole ……………………………………………... 17
4.2 Five Applications of Simulation ……………………………………………. 18
4.3 Simulation versus Optimization ……………………………………………. 19
4.4 A Successful Simulation ……………………………………………………. 20 |
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