ABSTRACT
The increasing complexity, duration and multitude of parties involved in a typical PPP procurement process, have made several studies to stress the importance of proactive and systematic capture of project knowledge through the use of formal lessons learned practices (LLP). The conduct of LLPs in the procurement of PPP projects has the potentials of improving the projects performance and providing information on reasons for their success and/or failures, the problems encountered and how they were addressed. This study evaluated Lessons Learned Practices (LLPs) in PPP projects in Nigeria through the use of Semi-Structured interviews with people from two client organizations and two concessionaires who have participated in 19 PPP projects and case studies of two PPP projects. The interviews have revealed that all the project participants considered LLPs in PPP projects as desirable and useful; the projects' participants' knowledge in LLPs needed to be improved; the conduct of LLPs was neither formalist nor conducted in accordance with best practice or requirements of the LLP concept; there was no framework and/or standard template for the conduct of LLPs; none of the interviewees' organizations has a knowledge management strategy for the capture, application and sharing of project knowledge; while the level of LIP application in the projects was discovered to be only 12%. Case Studies of the two PP projects conducted thereafter with a view to arriving at more conclusive findings have confirmed the first five findings of the interviews while the average level of application of Lips per project was below 9.1%. The findings have further suggested that correct conduct of Lips in the procurement of PP projects in Nigeria can lead to a more successful delivery of such projects.