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This paper presents a study on the impacts of information sharing and ordering co-ordination on the performance of a supply chain with one capacitated supplier and multiple retailers under demand uncertainty. In particular, a computer model is proposed to simulate inventory replenishment decisions by the retailers and production decisions by the supplier under different demand patterns and capacity tightness. It is found that information sharing and ordering co-ordination significantly impact the supply chain performance in terms of both total cost and service level. It is also found that the value of sharing information and ordering co-ordination is significantly affected by demand patterns and capacity tightness. Guidelines are developed for companies to share information and co-ordinate orders under different conditions. These guidelines can help companies reduce costs and improve customer service levels in the supply chain.

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