Pivot – Simulation Market Niches

Hey! We are two developers who, for the past year, has been building a Saas based forecasting/simulation application (Agent Based Simulation / Machine Learning). We've been collaborating with an expert in the supply chain domain which we hoped would lead us to creating a useful product. However, this individual has become increasingly less available. Our potential customers (for our current niche) is across the globe which makes it quite hard to move forward. We're now considering do a pivot.

Does anyone have any suggestions of market niches where simulation could play a role (e.g for decision support etc) ?