Recent advances in mobile technologies and infrastructures have led to increasing demands for ubiquitous access to enterprise services from mobile handheld devices, such as mobile phones and PDAs. The context in which such a service is used becomes an integral part of the associated enterprise application. This demands a new paradigm for system requirements elicitation and design in order to make good use of such extended context information. Instead of redesigning or adapting existing enterprise services in an ad-hoc manner, we introduce a methodology for the elicitation of context-aware adaptation requirements and the matching of context-awareness features to the target context by capability matching. For the implementation of these adaptations, we propose the use of three tiers of views: user interface views, data views, and process views. This approach centers on a novel notion of process views to service adaptation according to their context. We demonstrate our methodology by extending an enterprise appointment service into a ubiquitous one with context support.