  We investigate the potential of using Large Language Models (LLM) to support
process model creation in organizational contexts. Specifically, we carry out a
case study wherein we develop and test an LLM-based chatbot, PRODIGY (PROcess
moDellIng Guidance for You), in a multinational company, the Hilti Group. We
are particularly interested in understanding how LLM can aid (human) modellers
in creating process flow diagrams. To this purpose, we first conduct a
preliminary user study (n=10) with professional process modellers from Hilti,
inquiring for various pain-points they encounter in their daily routines. Then,
we use their responses to design and implement PRODIGY. Finally, we evaluate
PRODIGY by letting our user study's participants use PRODIGY, and then ask for
their opinion on the pros and cons of PRODIGY. We coalesce our results in
actionable takeaways. Through our research, we showcase the first practical
application of LLM for process modelling in the real world, shedding light on
how industries can leverage LLM to enhance their Business Process Management
activities.
