1. A method for determining which services in a service model to expose, the method comprising: determining a granularity of one or more services of the service model; re-factoring and refining a service portfolio and a hierarchy of the service model, wherein the re-factoring and refining comprises at least one of: eliminating at least one duplicate service and consolidating at least one set of services having a minor variation; adapting a Service Litmus Test (SLT) and service exposure scope to the service model, wherein at least one SLT is a project or client customized SLT defined for an engagement to support a need of the project or client; applying Service Litmus Tests (SLTs) to the service model, wherein each SLT applied to the service model is rated with an applicability of the SLT to the services; and verifying, with each affected stakeholder associated with the service model, that the service model achieves business and technical needs based on the results of the SLTs, which include tests to make exposure decisions, including whether to expose the service or not expose the service, wherein the services represent business capabilities and are placed in the hierarchy of the service model which represents the granularity.