Purpose The purpose of this paper is to explore, in literature and practice, the use of ex post impact evaluations within the public–private partnership (PPP) context and understand the major considerations for developing a PPP ex post impact evaluation method. Design/methodology/approach This paper applies exploratory research through expert interviews from Chile and Australia to describe: the relevance of this kind of evaluation, and the challenges of designing and conducting a PPP ex post evaluation. Findings The study confirms the lack of a formal method for evaluating the impact of a PPP project. Experts agree on the relevance of performing ex post evaluations to PPP projects and that in practice there is no formal procedure to follow. Among other challenges, experts discussed four general ex post evaluation aims: transparency and accountability, PPP legitimization, industry learning and government agency learning. Research limitations/implications This study confirms the gap in knowledge and contributes to the developments of approaches to perform ex post impact evaluation of PPP projects. It also provides several suggestions that need to be addressed when attempting to evaluate PPPs beyond the financial and contractual parameters. Originality/value The topic is not fully addressed in the literature, and this study contributes to the initial discussion and development of this evaluation method, which is considered significant for the development of public infrastructure.
PurposeThis study aims to develop an ex-post impact evaluation method for public-private partnership projects (PPP) that addresses one of its main difficulties: the multiplicity of perspectives and stakeholders that exist in these projects.Design/methodology/approachThis study first developed a conceptual evaluation framework called ‘Project Success Evaluation Pyramid Model’ (PSEPM) that was designed using a Design Science approach. Second, an impact evaluation method was designed based on the PSEPM. This evaluation method was tested and refined using three PPP projects. This article presents the refined conceptual model PSEPM, the evaluation method and one of the three tests: the PPP toll road.FindingsThe impact evaluation method describes how to evaluate the impact of an existing mega project from the perspective of multiple stakeholders and isolate the impact of the procurement method. Its application in practice is demonstrated with a PPP toll road project in Chile, in which 11 stakeholders were identified. Issues such as city segregation, deficient business model, the relevance of infrastructure availability, and deficient service-fee strategy were identified in the project. The evaluation method provides a judgement about the use of the PPP procurement method and about the overall impact of the project, reconciling the stakeholder perspectives.Originality/valueThe use of this approach could give greater clarity and legitimacy to the discussion over the use of PPPs by evaluating existing projects beyond the use of traditional time and cost measurements. Its originality is the systematic recognition and identification of stakeholder motives, purposes, and judgements over a project.
Purpose The Government of Sierra Leone has launched a strategic plan 2019–2022 that includes a large focus on new large infrastructure. This plan includes the Lungi Bridge project, a 7-km bridge for connecting the capital city Freetown with the Lungi airport, procured with a public–private partnership (PPP) model. This study aims to reflect on seven issues regarding the plan implementation and the procurement of the Lungi Bridge project. Design/methodology/approach This study uses case study analysis (Sierra Leone’s infrastructure plan), in which existing literature and expertise is applied to discuss/reflect the implications for the future. Findings Among other reflections, this study addresses the benefits and risks of using a PPP option with non-sovereign guarantee, off-balance sheet treatment and a special purpose vehicle for multiple projects; this study also discusses the social risk of misperceiving the bridge as a basic essential transport option (non-voluntary). Practical implications The reflective process can contribute significantly to policymakers in Sierra Leone and its neighbour countries, as it is a contextualised analysis for the country. Originality/value Many studies have addressed existing PPP projects and contexts for low-income countries. However, to best of the author’s knowledge, the analysis of a single government infrastructure plan has not been addressed. Moreover, for the Sierra Leone’s context, this is unique.
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