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Businesses have become increasingly complex over the past few decades. Every aspect of business operation and service requires the use of information technology (IT), and many enterprises are showing a growing interest in service oriented architecture (SOA). Because they recognize the competitive advantage that can be achieved by linking all phases of the business operations and deliver business services to customers. However, the adoption of SOA in organizations and the configuration of IT in direct support of their business are a very complex process. This paper provides a broad discussion on the building of service oriented architecture from value proposition and service orientation principle point of view. A SOA model will provide the technology underpinnings for working with services that are value business activities. This will transform IT into building blocks and services that are easy to assemble and configure or reconfigure. In today’s changing business environment, the SOA provide a viable solution for enterprises to keep moving forward to the next level of business operations.