Which of the following principles encourages learning from previous experiences?

The principle that emphasizes learning from previous experiences is indeed focused on the idea that teams and organizations can improve their practices and processes by reflecting on past projects. This principle promotes a culture of continuous improvement and encourages teams to document lessons learned and apply them to future endeavors.

By capturing insights from earlier projects, teams can identify what worked well and what didn't, leading to more effective planning and execution in the future. This proactive approach to learning not only enhances team agility but also contributes to better overall project outcomes. The systematic reflection on both successes and challenges helps teams avoid making the same mistakes repeatedly and fosters an environment where ongoing learning is prioritized.

In contrast, the other principles focus on different aspects of project management. For instance, managing by stages provides a structured approach to project progression, while focusing on products emphasizes delivering value through the end products of a project. Defined roles and responsibilities are about ensuring clarity and accountability among team members rather than the learning aspect. Thus, the principle of learning from experience stands out as the key element that specifically encourages reflection and growth based on past encounters.