Design approach

Some claims that Service Orientation is bottom-up and Process Orientation is top-down. Since a process is encapsulated by a service, this service is higher up in the design then the encapsulated process. But, this service is on the other hand used by another process which puts that process up higher in the hierarchy. But who knows, there might be a service on top of this process as well. So, with mathematical induction one can prove that none is more top-down than the other.