The increasing complexity of processes used for design and execution of critical business activities demands novel techniques and technologies. Process viewing techniques have been proposed as a means to abstract from details, summarize and filter out information, and customize the visual appearance of a process to the need of particular stakeholders. However, composition of process view transformations and their provisioning as a service to enable their usage in various different scenarios is currently not discussed in research. In this paper, we present a lightweight, service-oriented approach to compose modular process viewing functions to form complex process view transformations which can be offered as a service. We introduce a concept and an architectural framework to generate process view service compositions automatically with focus on usability. Furthermore, we discuss key aspects regarding the implementation as well as different scenarios where process view services and their compositions are needed.