Within this model, architecture services – defining and managing the architecture – is clearly positioned as a supportive process. 
Architecture is not a goal in itself, but rather an enabler to guide changes so that the business objectives are achieved. The changes themselves are defined in the Strategic Dialogue and Developing within/without Architecture.  
Architecture services facilitate the Strategic Dialogue and the Development within Architecture. It provides the bridge between the business objectives and the projects responsible for the solutions. 

The necessary architecture principles and models are delivered to the Strategic Dialogue in support of the business cases. Developing within Architecture is supported with concrete kaders; directives; resources and design choices in the form of a project start architecture. 
The trigger for architecture services is usually a solid business case that requires further enhancing. 
The objective of Architecture Services is to ensure that things are done appropriately.