By some definitions, a supply chain is a network of facilities that performs the functions of procurement of material, transformation of material to intermediate and finished products, and distribution of finished products to customers. The supply opportunity analysis technique moves away from a reactive to a proactive mode by taking (determining) the suppliers’ perspective. When customers demand customized products, products often become increasingly complex. In addition, the development and manufacturing of such products demand even greater resources that need to be shared by the supply chain members. In addition, the development and manufacturing of such products by the original equipment manufacturing partners require supply chain members to increasingly share available resources as virtual partners. To the suppliers, these virtualpartnerships can provide both opportunities of growth and threats of becoming obsolete from the supply chain. A supplier is usually involved with multiple customers and therefore in several supply chains. The supplier receives both firm orders and forecast orders. To be successful, the supplier needs to negotiate these firm orders and the forecast orders with its suppliers. To deliver customized products with short delivery times and high due-date observance, to plan for the supplier’s own raw material requirements, it is important for the customer to effectively share information.