This document discusses out-of-trend (OOT) results, which occur when a result does not follow the expected trend based on past data. It notes that identifying OOT results is becoming a regulatory issue and introduces some statistical approaches for doing so, like using a minimum of 25 batches to set a trend range of average ±3 standard deviations. Some challenges of implementing OOT identification for commercial batches are determining the appropriate statistical approach, data requirements, and investigation process. The conclusion states that identifying OOT results is important for regulators and industry, and the method should not be too complex.