  Industrial Product-Service Systems (IPSS) are increasingly dominant in
several sectors. Predominant value-adding services provided for industrial
assets such as production systems, electric power plants, and car fleets are
remote asset maintenance, monitoring, control, and reconfiguration. IPSS
designers lack methods and tools supporting them in systematically deriving
technical design requirements for the underlying Cyber-Physical System (CPS)
IPSS services. At the same time, the use of Digital Twins (DTs) as digital
representations of CPS as-sets is becoming increasingly feasible thanks to
powerful, networked information technology (IT) and operation technology (OT)
infrastructures and the ubiquity of sensors and data. This paper proposes a
method for guiding IPSS designers in the specification and implementation of DT
instances to serve as the key enablers of IPSS services. The systematic mapping
of the continuous IT design-build-deployment cycle concept to the OT domain of
CPS is at the heart of the applied methodology, which is complemented by a
stakeholder-driven requirements elicitation. The key contribution is a
structured method for deriving technical design requirements for DT instances
as IPSS. This method is validated on real-world use cases in an evaluation
environment for distributed CPS IPSS.
