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The application of circular economy (CE) has received wide coverage in the built environment, including public-private partnership (PPP) infrastructure projects, in recent times. However, current studies and practical implementation of CE are largely associated with construction demolition, waste and recycling management. Few studies exist on circular models and success factors of public infrastructures developed within the PPP contracts. Thus, the main objective of this article is to identify the models and key success factors associated with CE implementation in PPP infrastructure projects.

A systematic review of the literature was undertaken in this study using forty-two (42) peer-reviewed journal articles from Scopus, Web of Science, Google Scholar and PubMed.

The results show that environmental factors, sustainable economic growth, effective stakeholder management, sufficient funding, utilization of low-carbon materials, effective supply chain and procurement strategies facilitate the implementation of CE in PPP infrastructure projects. Key CE business models are centered around the extension of project life cycle value, circular inputs and recycling and reuse of projects.

Although the study presents relevant findings and gaps for further investigations, it has a limited sample size of 42 papers, which is expected to increase as CE gain more prominence in PPP infrastructure management in future.

The findings are relevant for decision-making by PPP practitioners to attain the social, economic and environmental benefits of transitioning to circular infrastructure management.

This study contributes to articulating the key models and measures toward sustainable CE in public infrastructure development.

This 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.

This 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.

The 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.

The 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.

The risks and uncertainties of public–private partnership (PPP) projects threaten their sustainability. Contract flexibility, which is based on the theory of incomplete contract and transaction cost, may be a viable solution to this issue. The purpose of this study is to investigate the relationship between contract flexibility and the sustainability performance of PPP projects. The multiple mediating roles of justice perception and cooperation efficiency are assessed, thereby allowing the pathways and conditions to be understood more comprehensively for improving the sustainability performance of PPP projects.

Nine hypotheses in the proposed research model are tested via structural equation modeling using data acquired from 218 Chinese PPP professionals.

Results show that contract flexibility positively affects PPP project sustainability performance. Justice perception and cooperation efficiency play direct and sequential mediating roles in this effect.

This study validates that contract flexibility positively impacts the sustainability performance of PPP projects, where justice perception and cooperation efficiency serve direct and sequential mediating roles. The findings of this study contribute to an improved understanding of the effect of contract flexibility on the sustainability performance of PPP projects. Furthermore, they provide important theoretical and practical insights into contract management as well as beneficial information and valuable initiatives for improving the sustainability of PPP projects.

Infrastructure development through public-private partnership (PPP) route in India has exhibited concerns about not promoting progress toward sustainable development goals, particularly social and environmental perspectives. The purpose of this paper is, therefore, to identify the shortcomings in the Indian PPP procurement process using the key principles of sustainability.

Qualitative research inquiry through grounded theory approach by using the literature and interview source was used to identify the challenges encountered in sustainable infrastructure development of PPP projects. These challenges were, first, reviewed from the perspectives of key sustainability principles and then discussed with the key stakeholders through focused interviews. Furthermore, micro-interlocutor analysis was carried to get an insight on the extent of consensus amongst the experts regarding these identified shortfalls.

The key shortfalls identified from the study that adversely affect progress toward sustainable development include incomprehensive environmental impact assessment and social impact assessment studies; lack of stakeholder and local participation; high bidding and transaction cost; high user charges; improper risk allocation; lack of transparency and accountability; goal conflicts between public and private sector; and lack of skill and knowledge about sustainability.

The study findings will help in devising appropriate strategies for enhancing the mechanisms, policies, and governance structure of PPP process in order to overcome these shortfalls and help in accomplishing the goals of sustainability while developing infrastructure even through PPP route.

The paper presents different insights into PPP from sustainability perspective which has not been the focus of the current studies on PPPs. Sustainability assessment of PPP procurement is an area of research which is in a nascent stage.

The purpose of this paper is to identify the critical success factors (CSFs) and key areas for improvement for public–private partnerships (PPP) in affordable housing schemes (AHS) projects, using Tanzania as a case study.

Semi-structured interviews were conducted with 10 public and private sector practitioners in Tanzania. The collected data and the interview transcripts were analysed using the standard qualitative analysis technique of content analysis.

The findings show the six most important CSFs as: a dedicated team of professionals to oversee the PPP projects, official and unofficial site visits and inspection, government support and guarantees, undertaking checks and balance from the design stage to construction stage, scrutiny of PPP project proposal and trust and integrity. The mapping of the CSFs across the PPP project lifecycle highlighted a higher incidence across the following phases: building (n = 11), preparation (n = 10) and operational (n = 9).

The identification of these CSFs would support PPP practitioners in successfully implementing PPP in AHS; besides, there is potential for their inclusion in the future development of the affordable housing PPP conceptual framework. Therefore, based on the identified CSFs, both the government and policy makers could use the findings as the basis for re-examining the existing PPP policy and regulations and reflecting on the existing situation with a view to improving the delivery of future PPP projects.

This paper provides the first empirical study by applying direct content analysis to identify and understand the CSFs and key areas for improvement for PPPs in AHS within the Tanzanian housing sector. This is rather an under researched subject around CSFs for PPPs from developing countries such as Tanzania.

Successful execution of public–private partnership (PPP) projects is the most desirable outcome to all stakeholders. Previous studies show that one of the topmost obstacles to fulfil this desire on the project is financial risks. Nonetheless, inadequate holistic studies exist on linking the management of this challenge to the financial returns of the project. This study aims to develop a theoretical framework interrelating financial risks, financial controls and financial performance of PPP projects.

The theoretical framework is informed and supported by existing theories and previous empirical studies from construction management, finance and economics. The underlying theories captured in the framework were chosen for their relevance and applicability to PPP projects. The propositions developed from the analysis of the theories and the empirical literature are summarised in three main hypotheses and 26 operationalised sub-hypotheses.

The major elements of the framework include the financial risks and 12 sub-themes which are commonly experienced on PPP projects. Financial policies and procedures on controlling financial losses of the projects are also included in the framework. Lastly, this study creates financial criteria on the projects which are intrinsically embedded in the framework to serve as benchmark to support the measurement of financial success.

This study is a theoretical review of classical theories and empirical studies, and therefore, not all researches and managerial controls have not been included in this framework due to restricted time and limited studies on the topic.

This paper would serve as a multidimensional guide to project managers to mitigate financial risks and hopefully enhance the financial success of PPPs. Theoretically, this paper outlines the dimensions of managing financial risks of PPPs that require valid and reliable measurement to test the interrelationships of the constructs by further studies in the construction research community.

This theoretical framework makes ambitious efforts to embrace multifaceted theories from different disciplines to shed light on holistic mechanisms to mitigate financial risks to improve financial returns of PPP projects.

This paper has two objectives. The first objective is to examine the important performance indicators of the lifecycle process of public private partnership (PPP) projects. The second objective is to investigate the difference in the perception of the importance of the performance indicators between the public and private sectors.

To achieve the research objectives, the study used a questionnaire survey. The questionnaire was distributed via postal mail to officers of government departments and private sector companies who may have been involved in PPP projects. A total of 237 completed questionnaires were received, representing a 51.52% response rate. To examine the importance of performance indicators, the descriptive statistical tests of mean, standard deviation and mean score ranking were used. Independent t-tests were conducted to investigate the differences in the perceptions of the importance of performance indicators between the two respondent groups.

The findings show that all the 16 performance indicators are perceived as important and very important. The top five important performance indicators for a PPP project lifecycle process are “Time management”, “Contractual management”, “Cost management”, “Safety management” and “Effective risk management system”, while “stress or conflicts management” is the least important. In terms of the differences in the perception of the public and private sector groups, the results indicate that four indicators (“environment protection”, “cost management”, “effective risk management system” and “good work environment”), show a significant statistical difference between the perception of the public and the private sector respondents.

This study offers empirical evidence on key performance indicators for a PPP project that are crucial throughout its lifecycle as perceived by two key parties in a PPP contract, i.e. the public and the private sectors.

With the increasing interest in public private partnership (PPP), there is a need to investigate the factors contributing to successful delivery of PPP projects. The purpose of this paper is to analyze the perceptions of respondents from Hong Kong, Australia and the UK on the importance of 18 such factors.

An empirical questionnaire survey was conducted in Hong Kong and Australia. The survey respondents were asked to rate 18 factors which contribute to delivering successful PPP projects.

The findings from this survey were further compared with the results achieved by a previous researcher in a similar survey conducted in the UK. The comparison showed that amongst the top five success factors ranked by Hong Kong respondents, three were also ranked highly by the Australians and British. These success factors included: “Commitment and responsibility of public and private sectors”; “Strong and good private consortium”; and “Appropriate risk allocation and risk sharing”. Therefore, it can be concluded that there are certain common critical success factors for conducting PPP projects, irrespective of the geographical locations.

The findings presented in this paper have highlighted the most significant critical success factors which may be applicable to all jurisdictions, and also those which are specifically for Hong Kong and Australia. It is believed that the participants of future PPP projects can use these findings to maximize the success of conducting similar projects.

Globally, the management of financial risks has gained much attention in the public–private partnerships (PPP) market in recent years. Existing studies rank financial risks among the topmost risk factors that determine the success or failure of a PPP project. As essential for managing financial risks, a systematic review of previous studies on financial risk management of PPP from 1995 to 2019 (inclusive of both years) has been presented in this paper.

The paper undertakes a systematic analysis of 49 relevant and available studies on financial risk management of PPP projects.

From the results, high-interest charges, increased construction costs and increased market risks are some of the key financial risks hampering the success of PPP projects. Techniques used to assess financial risks include Monte Carlo Simulation (MCS) and Net Present Value (NPV). Financial risks control adopted by project managers include minimum revenue guarantee and real option pricing. Extremely limited studies on financial risk management in PPP projects in developing economies was revealed.

Project managers in developing financial risk management models may use the outcome of this paper to improve the financial success of PPP projects. Holistically, researchers will be guided to investigate and heighten the pertinent issues on financial risk management of PPP projects in academia.

The results provide a rare guide to project managers in controlling financial risks of PPP projects which is an unexplored topic. It is also the first paper to highlight the issues of financial risk management in PPP projects research.

Public private partnership (PPP) has gained increasing popularity around the globe. Whether the government needs to participate in the PPP special purpose vehicle (SPV) as an equity coinvestor is a critical issue in PPP development. This research aims to examine the influence of government equity investment on PPP performance by taking public-private communication as an intermediate variable.

A questionnaire survey was adopted as the main research method. PPP practitioners with extensive experiences from both the public and private sectors were targeted respondents. The survey results were subsequently analyzed using statistical data analysis method.

Based on the results from the questionnaire survey, this research indicates an inverted U-shaped relationship between the ratio of government equity and performance in PPP projects. In addition, communication plays a mediating role between government equity investment and PPP project performance.

This research explicates the relationship between the equity structure in a PPP SPV and the project performance. It provides important guidance and reference for PPP practitioners to structure the SPV and associated financial and commercial arrangements. It also offers valuable insights into the development of PPP policy, especially regarding the structuring of PPP models in China and elsewhere.