This document discusses the limitations of people analytics and big data in capturing important human factors in evaluating job performance and talent. It summarizes as: People analytics aims to use big data and tests to predict job fit but can overlook important interpersonal qualities best judged by those who know the individual well. While businesses see benefits, algorithms make assumptions that can discriminate unfairly. Focusing only on performance metrics may indicate the wrong person is the best boss if their impact on employee morale, loyalty and stress is ignored. Statistics are not certainty and apparent correlations may simply be noise, not true signals of talent or future behavior.