Yep. I advise my clients to have a controlled, sandbox partition of prod. Call it the whiteboard or what have you, things can be erased or you can cache model v

Yep. I advise my clients to have a controlled, sandbox partition of prod. Call it the whiteboard or what have you, things can be erased or you can cache model version runs. Your data transforms can happen in dev but training should happen against real data. Synthetic data can be a compromise but that can sharply bias your model and, since it a harder lift, often multiplies data prep time