全球化競爭儼然已成為現今市場的趨勢，必須透過供應鏈的連結互相協調及合作才能在現今的市場中生存，而供應鏈管理最主要的目的即為整合整體供應鏈成員間的資源與訊息，透過資訊的分享與協調提升效率，減少不必要的浪費，以追求整體供應鏈的利益最大化。本研究最主要的目的，是以供應商而言，希望透過資訊分享以減少成本並增加利潤，且利用收集資訊的成本與收集資訊所得到的利益相權衡，以找出利潤最佳時的資訊分享程度，使資訊分享系統達致最佳效益。
本研究考量一二階供應鏈，並著重於資訊分享對於供應商的成本及利潤之影響，當零售商分享資訊給供應商時，其資訊必須為完全正確，而收集資訊的成本為一遞增函數，因收集更精確的資訊所必須要花費的成本就越高，但隨著資訊分享的程度越高，能夠獲得改善的程度會越低，因此收集資訊所獲得的利益為一凹函數，故能在收集資訊的成本與所獲得的利益中找尋資訊分享在何種程度下能有最大的獲益。從成本分析的研究中，供應商所得到的利益是因為得到市場資訊可降低存貨成本，降低的成本即為透過資訊分享所得到的利潤。本研究證明資訊分享確實會帶來正面的效益，資訊分享程度愈高能夠降低的存貨成本即愈多，且其利潤在某一程度後會隨著資訊分享程度愈高而遞減，在收集資訊的成本上則分為線性遞增與指數遞增兩種，探討在不同成本模式下最佳之資訊分享程度應為何，可發現最佳之資訊分享程度會與市場需求之相關性有正向關係，即市場每期需求之相關性愈高，資訊分享愈有價值，則最佳之資訊分享程度愈高。

Information sharing has been a critical issue in the literatures of Supply Chain Management. Most studies discussed the value differences between situations with and without information sharing. In this study, we construct a model for finding the optimal degree of information sharing. With regard to the supplier, collecting information can reduce the inventory cost and such the cost reduction, which is often a concave function, would be the benefit of information sharing. On the other hand, the cost of collecting information, which is often linearly or exponentially increasing, is a convex function which, along with the gain from collected information, results in an optimal degree of information sharing for the supplier. We have shown that there is a positive correlation between the optimal degree of information sharing and the correlation between successive demands which means that the more current demand is related to its prior one, the higher value gain from information sharing, and the higher of the optimal degree information sharing.

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