With the e-business explosion of the past few years corporations were, and still are, faced with the challenge of time to market more than ever before. As a result the processes and applications that enable the enterprise were heavily augmented, extended, or both. Consequently, corporations currently have numerous disparate applications that provide similar and overlapping functionality and that are based on legacy architectures. These architectures are typically monolithic in nature and based on point-to-point interfaces. Executive management is realizing the inflexibility and cost of these legacy applications, and is looking for ways to innovate the application landscape. This is where Enterprise Architecture and Service Oriented Architecture come into the picture. This article describes the relationship between them, illustrated by a case study.

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