We also noted earlier that enterprise architecture is specifically concerned with
the relations between the layers. Also from a quantitative perspective the layers are
interrelated: higher layers impose a workload on lower layers, while the performance characteristics of the lower layers directly influence the performance of the
higher layers. The service concept that is central to the ArchiMate language plays
an important role in connecting these layers, also in a quantitative sense (Jonkers
and Iacob 2009).