• Netflix’s personalisation technologies are powered by Artificial Intelligence, Machine Learning and a family of ranking algorithms. Netflix is accelerating the pace of algorithm innovation by putting together a two-stage online experimentation process. The first stage is a fast-pruning step in which the company identifies the most promising ranking algorithms from a large initial set of ideas. The second stage is a traditional ‘A or B’ test on the pared-down set of algorithms to measure their impact on longer-term member behaviour.