Googe's Rule #2: > First, design and implement metrics. > Before formalizing what your machine learning system will do, track as much as possible in your curr

Googe's Rule #2: > First, design and implement metrics. > Before formalizing what your machine learning system will do, track as much as possible in your current system. Do this for the following reasons: > * It is easier to gain permission from the system’s users earlier on. > * If you think that something might be a concern in the future, it is better to get historical data now. :-/