The book presents a holistic approach to organization performance improvements by lessons learned management. Such an approach is required because specific methods, such as debriefing, task management or procedures updates, do not achieve actual improvements. The presented model spans the entire life cycle of lessons learned: Starting from creating new lessons, moving on to knowledge refining and ending with smart integration into the organizational environment so future re-use of knowledge is enabled. The model also addresses other sources of organizational learning including quality processes and employee experience utilization.