“Many companies create their own metrics to map business metrics to ML metrics. For example, Netflix measures the performance of their recommender system using take-rate: the number of quality plays divided by the number of recommendations a user sees.4 The higher the take-rate, the better the recommender system. Netflix also put a recommender system’s take-rate in the context of their other business metrics like total streaming hours and subscription cancellation rate. They found that a higher take-rate also results in higher total streaming hours and lower subscription cancellation rates.5”