Your stakeholders lack a shared understanding of the methods and practice of advanced analytics. You start out with a trust deficit when explaining how the mathematics will improve business results.
To build trust, start in advance by building an ordinary business relationship to the operations management. Next share stories of analytics successes and how they were achieved (ideally those that you have directed). Next coach your stakeholders to interpret model results by simplifying the complex model validation process.
Gradually build an Arena of shared understanding for how models can help operations arrive at a better performance state. This is hard work and not the stuff of algorithms and data but almost as important.
Look at the Jahari Window for expanding the Arena of trust.
Edward H. Vandenberg