ORCID Profile
0000-0001-6708-7647
Current Organisation
Karolinska Institutet
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Publisher: Elsevier BV
Date: 06-2017
Publisher: Emerald
Date: 07-10-2013
DOI: 10.1108/JEDT-12-2011-0080
Abstract: – The past few years have seen some private sector involvement in urban and small-town water provision in Ghana, as the government strives to improve access to water supply services for its citizens in line with millennium development goals. Since 1995, both central and local governments have entered into various forms of public-private partnerships (PPPs) contracts. The paper aims to examine challenges and investment needs of Ghanaian water supply sector that necessitated private sector involvement trends, and factors that constrain the development and implementation of projects with private sector involvement in the sector. – A research approach integrating multi-stage critical review of relevant related literature and case studies is adopted in this paper. The study is further informed by the authors' experience in the sector and knowledge of PPPs. Analysis of data from different sources, using both approaches, provides both historical and contemporary approach to water management practice in Ghana. – The paper reveals that the Ghanaian water supply sector mirrors the classic challenges of public sector utilities in developing countries. Under-investment by government is the major cause of the ill-performance of the sector, necessitating private sector involvement. Management contract has emerged as a popular form of water supply PPP in Ghana. Further, optimal risk allocation has not been widely adopted in these contracts, and not yet been given much attention by practitioners and researchers in the literature of water management in Ghana. – The paper provides useful insights into the constraints of the water supply sector, development and implementation challenges of PPPs in the sector, and prompts a need for more research on risk allocation in water supply PPP contracts.
Publisher: Informa UK Limited
Date: 26-03-2018
Publisher: American Society of Civil Engineers (ASCE)
Date: 11-2017
Publisher: Emerald
Date: 02-10-2017
Abstract: The purpose of this paper is to identify the factor groupings of a set of 19 critical success factors (CSFs) associated with managing public-private partnership (PPP) projects at the operational stage and examine the most significant factor grouping using fuzzy synthetic evaluation (FSE) technique. The paper adopted a comprehensive review of the pertinent literature and an empirical questionnaire survey geared towards targeted international PPP experts. Survey responses were analysed using factor analysis and FSE modelling. The results from factor analysis show five CSF groupings (CSFGs) for managing operational PPPs. These are proficient service delivery and adequate legal structures, simplified payment mechanism and consistent project monitoring, effective contract variations management, suitable stakeholder management mechanism and environmental health and safety control. The FSE modelling shows that “simplified payment mechanism and consistent project monitoring”, is the most critical CSFG. The operational management CSFs under this grouping are acceptable level of user fee charges, efficient and well-structured payment mechanism, consistent project performance monitoring and long-term demand for public facility. The major limitation lies in the low s le size that was used for analysis however the years of research and/or industrial experience of respondents and the wide coverage of different cultural backgrounds (18 countries from five regions globally) contribute to the authenticity of the survey responses. Future research should adopt interviews and case study analysis to unravel CSFs in managing operational PPPs. The findings of this study are considerably beneficial to both public authorities and private operators. They inform practitioners of the strategic procedures and measures to employ in optimising the operational performance of PPP projects. Further, the methodology employed allows project management experts to reliably select the operational management CSFs for their projects.
Publisher: Elsevier BV
Date: 03-2017
Publisher: Vilnius Gediminas Technical University
Date: 25-11-2016
DOI: 10.3846/13923730.2014.945953
Abstract: The Delphi method has been used as a main research method by a growing number of researchers in the Construction Engineering and Management (CEM) field in the past two decades. Although a number of studies are available on the use of Delphi, few researchers fully examine the potential of the Delphi method in the combined use of statistical techniques, which is an inevitable trend for future Delphi research. This paper aims to review the combined use of Delphi and other quantitative methods in the CEM field based on a structured literature review of 88 relevant papers. All of the 88 papers are systematically identified from ten well-known peer-reviewed CEM journals published in the period of 1990–2012. Topic coverage, application requirements, and statistical techniques in the 88 Delphi papers are reviewed. The mix use of the Delphi method with three advanced modelling methods, such as Fuzzy sets, Analytical Hierarchy Process, and Analytical Network Process is also examined. These review results provide practical references for researchers having interests in applying Delphi method in CEM research.
Publisher: Elsevier BV
Date: 03-2022
DOI: 10.1016/J.JID.2021.07.176
Abstract: Pressure ulcer (PU) is a chronic wound often seen in patients with spinal cord injury and other bed-bound in iduals, particularly in the elderly population. Despite its association with high mortality, the pathophysiology of PU remains poorly understood. In this study, we compared single-cell transcriptomic profiles of human epidermal cells from PU wound edges with those from uninjured skin and acute wounds in healthy donors. We identified significant shifts in the cell composition and gene expression patterns in PU. In particular, we found that major histocompatibility complex class II‒expressing keratinocytes were enriched in patients with worse healing outcomes. Furthermore, we showed that the IFN-γ in PU-derived wound fluid could induce major histocompatibility complex II expression in keratinocytes and that these wound fluid‒treated keratinocytes inhibited autologous T-cell activation. In line with this observation, we found that T cells from PUs enriched with major histocompatibility complex II
Publisher: Emerald
Date: 07-03-2016
Publisher: Informa UK Limited
Date: 04-03-2015
Publisher: Springer Science and Business Media LLC
Date: 04-01-2014
Publisher: American Society of Civil Engineers (ASCE)
Date: 12-2018
Publisher: American Society of Civil Engineers (ASCE)
Date: 05-2017
Publisher: Elsevier BV
Date: 2017
Publisher: MDPI AG
Date: 06-06-2017
DOI: 10.3390/SU9060969
Publisher: Elsevier BV
Date: 2018
Publisher: Emerald
Date: 05-05-2015
Abstract: – This paper aims to report on the partial findings of a research project on risk allocation in public–private partnership (PPP) water projects. It identifies risk factors encountered in PPP water infrastructure projects, evaluates their associated risk levels and presents an authoritative risk factor list to assist the sector institutions to understand the important risks associated with such projects in Ghana. – A ranking-type Delphi survey was conducted to develop a rank-order list of critical risk factors. – Twenty critical risk factors with high impact on water PPPs were established. The top-five risks relate to foreign exchange rate, corruption, water theft, non-payment of bills and political interference. – Being the pioneering study, it holds implications for practitioners. By prioritising the risks according to their relative impacts on the success of water PPP projects, public and private participants will become more aware of and leverage efforts and scarce resources to address those significant factors with serious consequences on projects objectives. The paper adopts a research approach that can be used by future researchers in similar environments where PPP is novel and experts are hard to find.
Publisher: American Society of Civil Engineers (ASCE)
Date: 12-2017
Publisher: Emerald
Date: 25-04-2013
DOI: 10.1108/14725961311314651
Abstract: The public‐private partnership (PPP) procurement approach enables the development and management of public infrastructure and services through leveraging private capital, management expertise, and creative commercial skills. This approach, pursued by the Ghanaian Government in the development and management of water supply services, contains a plethora of risks resulting from the complexity and dynamic interactions between municipal and central governments (pursuing monetary and political goals), public movements, private water operators, and international donors pursuing their own objectives. The paper seeks to increase awareness of the risks that can erode or reduce potential benefits of PPPs in the water supply sector. A research approach integrating a literature survey and case study is adopted. A rigorous literature review of PPP risks is first undertaken. Based on six case studies carried out in the Ghanaian water supply sector, this paper identifies and categorises the risks specific to water supply PPP contracts in Ghana. A total of 40 risk factors are identified, classified into eight categories based on their sources and their content presented in detail. Common risks which are worth practitioners' attention include weak regulatory and monitoring regime financing absence of risk allocation mechanisms inexperience in PPPs public opposition delayed and non‐payment of bills, etc. A comprehensive list of risks associated with water supply projects in Ghana has been identified. This list will aid practitioners, municipal and central government authorities, and the domestic and the (potential) international private sector audience in managing risks involved in such projects.
Publisher: Emerald
Date: 05-05-2015
Abstract: – This paper aims to identify and evaluate the most significant risk factors that strongly affect the implementation of public–private partnership (PPP) water supply projects. PPP for water supply infrastructure services has seen continued growth over the past two decades, following public sector’s budgetary constraints and inability to provide infrastructure-based water services efficiently and cost effectively. However, these projects are often subjected to major risks leading to failures. – Following extensive literature review and case study analyses, an international questionnaire survey was conducted with practicing and experienced PPP experts to establish the significant risks in PPP water projects. Both the probability of occurrence and severity of 40 risks were evaluated by the expert panel to determine their significance and impact on water projects procured under the PPP arrangement. – The paper presents a derived risk factor list, ranks the factors and describes the “top-ranked” risk factors as: poor contract design, water pricing and tariff review uncertainty, political interference, public resistance to PPP, construction time and cost overrun, non-payment of bills, lack of PPP experience, financing risk, faulty demand forecasting, high operational costs and conflict between partners. – This factor list broadens PPP stakeholders’ view of important project risks, rather than relying on culture-dependent studies – an area that has received less attention in PPP risk management research. The identified risk factors would provide governments and investors a useful tool in implementing constructive water PPPs by facilitating the development of risk mitigation strategies, particularly for developing countries with poor risk management practices.
Publisher: Emerald
Date: 02-02-2015
Abstract: – The purpose of this paper is to identify and then evaluate perceived risk factors influencing variability between contract sum and final count, and to develop a fuzzy risk assessment model for evaluating the overall impact of established critical risk factors impacting on variability between contract sum and final account in government-funded construction projects. Construction projects are characterised by risk factors that significantly impact on variability between the contract sum and final account. – A research approach integrating questionnaire survey, mean scoring ranking and principal component factor analysis (PCFA) methods was adopted to evaluate and classify the critical risk factors. A fuzzy synthetic evaluation method was sequentially applied to compute the overall risk impact (ORI) of eight critical risk factors’ impact on variability between contract sum and final account. – Initial results showed that eight critical risk factors have high impact on variations between contract sum and final account, namely (in order): project funding problems, underestimation of quantities, variations by client, change in scope of works, inadequate specification, change in design by client, defects in design and unexpected site (ground) conditions. PCFA produced two factor solutions: “professional-related factors” and “client factors”. The fuzzy model further showed that the ORI is 5.48, indicating that these risk factors have a high impact on variability between contract sum and final account in public construction projects. The client factors have a very high impact (5.59), while the professional-related factors indicated a high impact (5.41) on project cost variability. – A practical model is proposed to evaluate the key risks associated with cost overruns in public projects. By giving effective and sustained attention to these factors, variability between contract sum and final account, a common situation in Ghana, can be controlled to achieve cost savings in public infrastructure projects.
Publisher: American Society of Civil Engineers (ASCE)
Date: 09-2016
Publisher: Elsevier BV
Date: 07-2015
Publisher: Vilnius Gediminas Technical University
Date: 02-01-2017
Publisher: Emerald
Date: 06-02-2017
Abstract: Public-private partnerships (PPPs) offer governments an opportunity to access private capital and skills to build or upgrade, operate and manage public water infrastructure services hitherto provided and run by the public sector. Access to private finance speeds up the provision of public water services in developing countries, where many governments face budgetary constraints. However, the water sector attracts the least investment flows in developing countries, well below other infrastructure sectors. This paper aims to present the results of an investigation of critical success factors (CSFs) required for attracting the private sector in water supply projects. A structured questionnaire survey of international PPP expert opinions was conducted. Analysis results show that the CSFs for attracting the private sector to water PPPs include political commitment from elected leaders toward PPPs for water supply existence of a dedicated PPP unit strong and competent public water authority adequate fiscal capacity of a national/subnational authority public acceptance and support of involvement of the private sector in water services a well-designed PPP contract existence of enabling policy and legal frameworks to support water PPPs and profitability of water supply project(s) to attract investors and lenders. Agreement analysis also indicates a strong to very strong agreement on the significance and rankings of the CSFs. The research findings provide an insight into a number of important issues to enable greater private participation in water supply projects, most of which aim at reminding governments of some key areas that need reform and enabling greater commitment among them to undertake such reforms. Given the limited empirical research on CSFs for attracting private participation, this research makes a contribution to the body of knowledge about private involvement in the water sector of developing countries.
Publisher: American Society of Civil Engineers (ASCE)
Date: 03-2015
Location: United Kingdom of Great Britain and Northern Ireland
No related grants have been discovered for Ernest E. Ameyaw.