Ex post impact evaluation of PPP Projects - the project success evaluation pyramid model

Abstract

Public-private partnership (PPP) model of procurement has been employed extensively and promoted internationally. However, their performance and their real capacity to achieve public welfare have been questioned. To address this criticism, there is no specific method to assess the impact of PPP projects after its operation phase; an ex post impact evaluation tool needs to be designed. The aim of the research is to develop an ex post evaluation procedure that can address the complexities of PPPs, namely (1) large size and technically complex projects, (2) multiple perceptions of the impacts, (3) vague and uncertain understanding of “public interest”, (4) long time horizon for the evaluation, ..