I want to create a funnel/tornado chart measuring fallout during a multi-step process such that a user can change the fallout at any step, and the rest of the data will update based on the initial ...

You’ve managed to acquire a million users. Amazing. But if 999,999 of them don’t make it through the funnel, or churn, now that’s not so amazing. That’s an extreme example, but it shows why optimizing ...