供應鏈管理的目的在提升不同企業夥伴合作的效果，其中協同運輸管理 (CTM) 是經由供應鏈的貿易夥伴與運輸服務業者實際地分享資訊與有效地合作，以減少實體流的瓶頸，達到改善供應鏈效率的目的。鑑於過去文獻對供應鏈協同的研究大多著重於探討供應鏈體系中不同階層成員的合作，較少探討運輸管理對供應鏈的影響，故本研究應用系統動態學方法構建一個包含 CTM 的供應鏈模擬模式，以探討 CTM 對供應鏈結構的影響。將製造商、物流中心與運輸業者考量為協同的參與者，假設三種情境：(1)沒有運輸容量限制，沒有實施 CTM；(2)有運輸容量限制，沒有實施 CTM；(3)有運輸容量限制，有實施 CTM。研究結果顯示 CTM可達到降低供應鏈成本、改善長鞭效應及提升運輸容量利用率的效果，CTM帶來的成本改善效果從上游往下游具有時間延遲 的現象，表示 CTM效果依然受限於供應鏈結構性的限制，其對下游的影響並非立竿見影。供應鏈各成員的成本改善會隨時間點而改變，長期言，下游零售商受益最大，且成本改善效果是受運輸可供應容量的上限影響，與可供應容量下限無關。當單位存貨成本愈高時，CTM的效果就愈大。隨訂單延滯時間縮短，供應鏈成本亦呈下降趨勢。

The purpose of Supply Chain Management (SCM) is to improve collaborative efforts among various business partners. Collaborative Transportation Management (CTM) is based on sharing of information and collaboration between trading partners and carriers on the supply chain, in order to avoid the inefficiency of physical distribution and accomplish the objective of improving the efficiency of supply chain management. Past studies in supply chain collaboration mostly focused on the parties of supply chains. Little attention, however, has been paid to the impact of transportation management on SCM performance. We propose a concept of CTM and the application of a System Dynamics approach to develop a supply chain simulation model using CTM to explore its impacts on the structure of supply chains. Three different scenarios are simulated: (1) unconstrained transportation capacity without CTM; (2) constrained transportation capacity without CTM; and (3) constrained transportationcapacity with CTM. The manufacturers, distributors and carriers are considered to be the partners of CTM. Results of the simulation demonstrate that the potential supply chain cost savings and the bullwhip effect of supply chains as well as the overall transportation capacity utilization are improved. This study found that cost improvement has a time delay from upstream to downstream and is varied with time. The impacts on the downstream are not immediate, and are limited by the structure of the supply chain. Supply chain costs are affected by the maximum available transportation capacity and are unrelated to the minimum available transportation capacity. The effects of CTM become significant with the increase of unit inventory cost. Supply chain cost is diminishing with order delay reduction.