A computer-implemented method, system, and computer program product for implementing a lessons learned knowledge management system is provided. The computer-implemented method includes building a project database which, in turn, includes identifying project phases for a project, identifying categories for the project, and mapping each of the categories to respective phases of the project. The computer-implemented method further includes generating a workflow structure for the project, which includes assigning a reviewer to each of the categories, assigning an action owner to each of the categories, the action owner tasked with taking action on the lesson learned and defining a routing plan and timeline for transmittal of the lesson learned between the reviewer and the action owner. The computer-implemented method also includes processing lessons learned received for the project via the project database and the workflow structure.