The document discusses the limitations and risks of using big data analytics and personality tests to predict job performance. While businesses have seen benefits from these approaches, experts warn that the quality of data analysis depends on the questions asked. Algorithms can make incorrect assumptions, and large data sets may find random correlations that don't reflect real patterns. Additionally, the metrics and tests used may not capture the most important factors for organizational success over the long term. A manager focused only on short-term targets could undermine company culture and morale. The best evaluators of a person's future potential remain those who know them well through past performance.