Wind turbine operations for example. Digital twins are experimented for predicting the condition of the turbines.

We see it up and down the supply chain, from manufacturing to warehouses to transport nodes.

Cool! What companies do the twinning? Is it handled in-house by the companies applying it or are they partnering with specialists?

Companies like GE, SAP, Mathworks, Dassault, PTC and Siemens all have digital twin platforms used by major manufacturers. Initially there was a period (2003 -2013) where twin systems were built my specialist media developers using 3rd party authoring tools and integrating with different system simulation tools. While this still happens for specialist or niche projects (or sometimes on very large projects with specific deadlines that require outsourced help). Increasingly most manufacturers build digital twins directy from design assets (CAD, CAM, Systems simulations etc) as part of the in-house product development process using extensions to their existing design and simulation tooling.

@ptrott2017 - i'd love to speak with you about this. please ping me at chris at pathmind dot com if you're open to a conversation.

Both. Depends on the size and skills of the company. Like most semi-rare skills, simulation modeling is something that large companies both perform internally and ask external consultants to do with them.