Under EASA Part-145.A.30(e), personnel involved in maintenance, airworthiness reviews, safety management, and compliance monitoring must demonstrate competency in safety management principles, including human factors and human performance. Human Factors (HF) training, Safety Management System (SMS) training, and Safety Training Including Human Factors are often treated as interchangeable, but they are not identical requirements. The article discusses the main differences between these courses, highlights their distinct regulatory purposes and training content, and helps organizations understand which training is required for different personnel and responsibilities under EASA Part-145.