With service-oriented architecture (SOA), once-siloed business functions, IT processes and data are exposed as services that can be reused--across departments, lines of business (LOBs) and even entire organizations. Many organizational groups, both internal and external, may help compose and execute business processes and frequently share certain processes in common. The unprecedented scope of an SOA initiative brings to the forefront a number of management and governance issues that were sidestepped in the past.