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Due to the heterogeneity of the existing platforms, IT Environments became very extremely complex, consequently the communication between the organizations more difficult. The service oriented architecture (SOA) claims that the interactions between different parities will be easier. Moreover after applying SOA on ERP systems there are some issues are raised like performance and modifications issues. This paper will discuss how we can make use of design patterns to handle the performance and requirements change after applying SOA on ERP systems.