> Over the summer of 2016, we came up against a new twist on the project. We had a model that ran overnight to generate data for anticipated ridership in China. That data wasn’t useful on its own, but if you fed it into a tab on a special Excel spreadsheet, you’d get a little interactive Excel tool for choosing driver incentives. Our job was to take that spreadsheet and make it available as the interface for this model’s data.

They eventually built a homegrown "Excel" clone as the UI for their model because "city teams only know how to use Excel".

I would have done it the other way around - connected Excel to the data output by the model so the "city teams" could continue to use real excel. I think most finance teams do something like this.