document: The n-tier hub technology During 2001 , the Enterprise Engineering Laboratory at George Mason University was contracted by the Boeing Company to develop an eHub capability for aerospace suppliers in Taiwan . In a laboratory environment , the core technology was designed , developed , and tested , and now a large first-tier aerospace supplier in Taiwan is commercializing the technology . The project objective was to provide layered network and application services for transporting XML-based business transaction flows across multi-tier , heterogeneous data processing environments . This paper documents the business scenario , the eHub application , and the network transport mechanisms that were used to build the n-tier hub . In contrast to most eHubs , this solution takes the point of view of suppliers , pushing data in accordance with supplier requirements ; hence , enhancing the probability of supplier adoption . The unique contribution of this project is the development of an eHub that meets the needs of small and medium enterprises -LRB- SMEs -RRB- and first-tier suppliers
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