現今供應鏈的成員是遍佈在世界各地。產品在A產地設計，在B產地製造，最後賣至C產地。顧客不只要求產品的品質,還要求配送產品的速度和準時交貨。為了滿足顧客的需要，企業必須和其上下游成員合作。由於供應鏈成員彼此之間的訂單延遲傳遞，物料延遲運送，缺乏資訊分享，還有不確定的因素包括產品品質、製造商的技術、多樣化的需求，愈往上游的供應鏈成員的訂單和存貨會較多。這會造成扭曲實際需求的資訊和不必要的浪費。在很多供應鏈績效改善方法中，資訊分享是得到較多的注意。
本論文的研究目標是要量化資訊分享的價值。我們簡化並且改寫Gaonkar 和Viswanadham所提出的數學模式而發展成三種數學模式，包括基本資訊分享模式、部分資訊分享模式和基本供應商管理存貨模式。最後我們藉由需求相關係數的數值實驗和需求變異的數值實驗可以發現三種模式的差異和量化資訊分享的價值。

Today the members of a supply chain are all over the world. The goods are designed in A place, manufactured in B place, and sold to C place. Customers emphasize on not only the quality of goods, but also the speed of delivery, and the due date on time. In order to satisfy customer needs, the enterprise must collaborate with its upstream and downstream members. Due to time delays in order, material transfer, a lack of information exchange among members of a supply chain, and uncertain factors included the quality of goods, the manufacturer technology, and the variety demand, a higher amplification of the order and the inventory fluctuations is observed upstream of a supply chain. These factors lead to the distortion of the actual demand information and cause unnecessary wastes. Among the various methods of the supply chain performance improvement, the information sharing has received a lot of attention.
The aim of this thesis is to try to quantify the value of the information sharing. We simplify and revise the mathematical model proposed by Gaonkar and Viswanadham to develop three models included basic information sharing (BIS) mode, partial information sharing (PIS) mode, and Basic VMI mode. Finally, we can find the difference of three models and quantify the value of the information sharing by the numerical experiments of the correlation coefficient of demand and the numerical experiments of the variance of demand.

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