Which of the following is a key phase in mishap investigation?

The determination of future preventive measures is a crucial phase in a mishap investigation because it focuses on learning from the incident to prevent similar occurrences in the future. This phase involves analyzing the factors that contributed to the mishap and developing strategies or policies that can be implemented to enhance safety and operational effectiveness.

In essence, this phase is aimed at not only addressing the immediate causes of the accident but also establishing a culture of safety and continuous improvement. By focusing on preventive measures, organizations can create a safer work environment and improve overall performance. This proactive approach emphasizes learning from mistakes rather than placing blame, which is essential in fostering an environment where safety is prioritized.

The other choices, while relevant to the investigation process, do not directly contribute to the overarching goal of preventing future mishaps, making the determination of future preventive measures the key phase in this context.