This article provides a comprehensive overview of the book "Noise: A Flaw in Human Judgment", co-authored by Nobel laureate Daniel Kahneman. The text explains that noise, defined as unpredictable variability in judgments, alongside bias, contributes to errors in decision-making. It categorizes noise into horizontal noise (consistent individual differences), stable pattern noise (predictable individual judgment patterns), and situational noise (context-dependent variations). Finally, the source proposes methods to reduce noise and improve judgment accuracy, emphasizing an open-minded cognitive style and a structured approach called the "intermediary evaluation method," which involves decomposing decisions, independent assessments, and a structured discussion process to mitigate decision-making errors.