Services in Industrie 4.0 - Interaction-based Architecture as defined in the DIN SPEC 16593-1

A common approach to face the requirements of smart factories is the definition of a reference model that provides guidance to software and system engineers when defining system (of systems) architectures. The paper provides an overview about the DIN SPEC 16593-1 recently published as a refinement of the Reference Architecture Model Industrie 4.0 (RAMI4.0). It is part 1 of an intended series of DIN SPEC 16593-x finally leading to a Reference Model of Industrie 4.0 Service Architecture (RM-SA). It clarifies the use of the terms "service" and service-oriented architecture (SOA) in RAMI4.0. The paper describes the classification into service types and the two major underlying interaction types: procedure-based interactions and state machine-based interactions to be used in Industrie 4.0.