Faculty of Engineering and the Built Environment (Research Outputs)

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Start date: 2024Has files: Yes

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    Making A Mark: Wits School of Construction Economics and Management and Its Contribution to the Construction and Property Fields
    (University of the Witwatersrand, Johannesburg, 2025) Laryea, Samuel
    This book is a historical account on the Wits School of Construction Economics and Management, its contributions and impact in society, which is very significant and leaves a positive impression of academic and industry development, despite historical hurdles. It looks at the past, present, and future of the School in the broader context of South African history and the overall development of the university. The process of writing this book has been both challenging and exciting with interesting discoveries about the academic disciplines and the growth trajectory of the School. It was challenging uncovering information from various sources within the university and external sources. It has also been an interesting process learning about the rich history and contributions of a key School within the university to the South African and global society. This book chronicles the careers of some graduates of the School who served in the highest leadership and management roles, and made an indelible mark in the construction industry locally and internationally. The School’s graduates have made substantial contributions to the growth and advancement of the South African construction and property sectors and their respective statutory councils including the South African Council for Quantity Surveying Profession (SACQSP), South African Council for Project and Construction Management Professions (SACPCMP) and the South African Council for the Property Valuers Profession (SACPVP). The School’s graduates have also played leading roles in major construction firms that have built some of the iconic buildings in South Africa and other parts of the world. In recent years, many of the School’s graduates are increasingly being recruited by firms in Europe, Middle East, Australia, and the US, indicating the quality of their education and their value to employers and the global construction industry.
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    Making a Mark: Wits School of Construction Economics and Management and Its Contribution to the Construction and Property Fields
    (University of the Witwatersrand, Johannesburg, 2024) Laryea, Samuel; Smit-Stachowski, Alexandra; Mphuti, Bongi
    This book is a historical account on the Wits School of Construction Economics and Management, its contributions and impact in society, which is very significant and leaves a positive impression of academic and industry development, despite historical hurdles. It looks at the past, present, and future of the School in the broader context of South African history and the overall development of the university. The process of writing this book has been both challenging and exciting with interesting discoveries about the academic disciplines and the growth trajectory of the School. It was challenging uncovering information from various sources within the university and external sources. It has also been an interesting process learning about the rich history and contributions of a key School within the university to the South African and global society. This book chronicles the careers of some graduates of the School who served in the highest leadership and management roles, and made an indelible mark in the construction industry locally and internationally. The School’s graduates have made substantial contributions to the growth and advancement of the South African construction and property sectors and their respective statutory councils including the South African Council for Quantity Surveying Profession (SACQSP), South African Council for Project and Construction Management Professions (SACPCMP) and the South African Council for the Property Valuers Profession (SACPVP). The School’s graduates have also played leading roles in major construction firms that have built some of the iconic buildings in South Africa and other parts of the world. In recent years, many of the School’s graduates are increasingly being recruited by firms in Europe, Middle East, Australia, and the US, indicating the quality of their education and their value to employers and the global construction industry.
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    Time and frequency nexus among public debt, exchange rate, inflation, monetary policy rate and economic growth in Ghana
    (Elsevier, 2025-01) Owusu Junior, Peterson; Odoom, Absalom; Adu-Asare Idun, Anthony; Akorsu, Patrick Kwashie
    The debate about the influence of public debt on an economy has gained long-standing attention among policy-makers, regulators and academic scholars. The excessive expansion of Ghana’s public debt to GDP demands a fresh insight into the macroeconomic variables that are connected to economic growth. This study utilised wavelet techniques to investigate the nexus and effect of public debt, exchange rate, inflation rate, and monetary policy rate on economic growth in Ghana using monthly data from 2000 to 2022. Diks and Panchenko (2006) was used as a battery test for the wavelet results. We found a significant negative correlation between public debt and GDP at both short- and long-term frequencies, though there was no notable connection in the medium term. The causality analysis suggests a possibility of bidirectional causality between GDP and public debt in both the short and medium term. Interestingly, the COVID-19 pandemic had minimal impact on this relationship when comparing the pre-pandemic and during-pandemic periods. The only observed coherence (negative) between monetary policy and GDP occurred between 2000 and 2003, at low and medium frequencies. The WMCC results depicted that no variable was seen to lead or lag during the pandemic period however, GDP (exchange rate) reacted to shocks first (last) in the short run (long run) prior to the pandemic. The result of this research is crucial for policy implementation. The GDP-public debt negative nexus offers strong evidence for the government to make determined efforts to reduce external borrowing. The positive coherence of exchange rates and the public debt offers a strong incentive to the monetary authorities to make determined efforts to stop the rapid rise of exchange rates.
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    Balancing urban regeneration to prevent displacement: a conceptual strategy for inclusivity in South Africa
    (Proceedings of the AfRES 2024 Conference, 2024-09) Gethe, Faranani; Simbanegavi, Prisca
    The regeneration of urban areas and neighbourhoods plays a crucial role in mitigating urban decay and enhancing socio-economic conditions. However, conventional urban renewal initiatives often inadvertently perpetuate geographies of exclusion, chiefly through gentrification and displacement. This paper is aimed at devising effective urban regeneration strategies that prioritise social inclusivity while mitigating the negative impacts of gentrification and displacement of poor people. The study employed a literature and theoretical review approach, utilising published articles and documents to assess the impact of urban regeneration programs on poor communities. The outcomes include the identification of shortcomings in current urban regeneration strategies and the need to formulate more equitable approaches. This study's significance lies in its contribution to expanding knowledge on urban redevelopment, particularly in the developing world of the global south. Furthermore, it will inform policy development aligned with Sustainable Development Goal 11 (Sustainable Cities and Communities) of the United Nations, thus facilitating much-needed advancements in urban development policies.
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    Comparing occupant satisfaction in Green versus Conventional Residential Real Estate in South Africa
    (Proceedings of the AfRES 2024 Conference, 2024-09) Masotya, Adam; Simbanegavi, Prisca; Weaich, Malcolm; Adewunmi, Yewande; Ndlovu, Pride; Gethe, Faranani
    This study compares occupant satisfaction in green versus conventional residential real estate in South Africa. It investigates the benefits and satisfaction levels related to green developments, particularly in terms of energy savings and socio-economic Impacts. The research aimed to determine if there is a significant difference in occupant satisfaction between green and conventional residential developments. A quantitative approach was employed, utilizing stratified random sampling to survey 160 occupants from two developments: Crossberry Central (green) and Little Manhattan (conventional). Data was analysed using the Mann-Whitney U and Wilcoxon W tests due to non- normal data distribution. The findings indicate that occupants of green developments report significantly higher satisfaction levels. Key areas of satisfaction include air quality, utility savings, and environmental benefits. Green developments demonstrate higher levels of satisfaction regarding reduced utility bills, improved indoor air quality, and contributions to environmental conservation. The study concludes that green residential developments significantly enhance occupant satisfaction compared to conventional housing. This suggests a socio-cultural shift towards valuing sustainable living environments, emphasising the importance of promoting green building practices to improve both environmental and occupant well-being.
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    An evaluation of the quantitative risk assessment simulation undertaken during the planning stage of mega-projects
    (University of the Witwatersrand, Johannesburg, 2024-07) Zwane, Sibongile; Schutte, David; Maila, Sue; Jones, Razaak; Laryea, Samuel; Li, Baizhan; Essah, Emmanuel Adu; Mensah, Sarfo; Liu, Hong; Yao, Runming
    This research examines how the absence of robust risk identification processes during the planning stage can significantly impact the quantitative risk assessment (QRA) outcomes and increase the likelihood of cost overruns in mega-projects in South Africa. By analysing specific mega-projects and their risk identification procedures, this study highlights the importance of a high-quality assessment of the QRA input stage in the context of these mega-projects. Through surveys and interviews with project managers and stakeholders, the study has provided deeper insights into the consequences of inadequate planning, such as project cost overruns and decreased project profitability. The research indicated that a robust risk identification process during the planning stage is pivotal in mitigating cost overruns in mega-projects in South Africa. Projects that prioritise structured methodologies involving all the relevant stakeholders and conduct comprehensive risk identification practices are better equipped to control project costs. The unanimous agreement on the significance of risk identification in cost overrun prevention emphasises its paramount importance. The findings will contribute to the risk management body of knowledge, offering valuable recommendations for improved risk identification and mitigation strategies to enhance project outcomes and positively impact project owners. Lastly, the paper sheds light on the nuanced landscape of risk identification, its impact on cost overruns, and the strategies for its improvement.
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    Detecting and preventing unbalanced bidding in South African public sector construction
    (University of the Witwatersrand, Johannesburg, 2024-07) Tilese, Neliswa; Makhaga, Thendo; Mphahlele, Matjelele; Zungu, Zamageda; Laryea, Samuel; Li, Baizhan; Essah, Emmanuel Adu; Mensah, Sarfo; Liu, Hong; Yao, Runming
    Unbalanced bidding in public sector infrastructure projects is a key challenge, involving the manipulation of unit prices without adjusting the overall bid. Unbalanced bidding increases the client’s financial risks and the likelihood of project abandonment by the contractor. Existing literature provides guidelines for detecting and preventing bid price imbalances but inadequately addresses the practical implementation and efficacy of these approaches. This research aims to evaluate the practices for detecting and preventing unbalanced bidding in the South African public sector against existing formal models. This qualitative case study employs semi-structured interviews with quantity surveyors from public sector clients in Gauteng, South Africa. The purposive, non-probabilistic sampling targets professionals with relevant expertise. A thematic analysis of the interview data reveals insights into the awareness, consequences, and practices associated with unbalanced bidding in the South African public sector. The study findings highlight the need for strengthened governance and accountability, more robust strategies for detection of unbalanced bidding, and enhanced education of practitioners to promote fair competition and ethical practices in awarding projects.
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    The job satisfaction of black female quantity surveyors
    (University of the Witwatersrand, Johannesburg, 2024-07) Punungwe, Fungai; Terblanche, Rolien; Laryea, Samuel; Li, Baizhan; Essah, Emmanuel Adu; Mensah, Sarfo; Liu, Hong; Yao, Runming
    Black women face discrimination in the quantity surveying profession hence experiencing tension to balance their careers and life, which results in them not being satisfied with their jobs. The aim of this research is to assess the job satisfaction of black females in quantity surveying and examine if discrimination affects it. Data was collected through online interviews with Black females that are Quantity Surveyors. The results were analysed using thematic analysis to assess similarities in responses. Issues of harassment discrimination were significantly recognised through deep interviews with participants. The issue of job satisfaction of black female quantity surveyors is less explored in literature. The findings of this research can be used by bodies of knowledge and industry professional to improve measures on issues of inequality and alleviate any problems.
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    Key barriers to green building implementation in South Africa
    (University of the Witwatersrand, Johannesburg, 2024-07) Mompati, Lerato; Mandlate, Mike; Kabini, Karabo; Nomvalo, Usiphe; Laryea, Samuel; Li, Baizhan; Essah, Emmanuel Adu; Mensah, Sarfo; Liu, Hong; Yao, Runming
    Due to climate change, South Africa is faced with economic and health challenges. Adopting green building technologies reduces the amount of energy usage, however the implementation of green building in South Africa has been slow. This research aimed to identify the barriers on the implementation of green building and the methods that can be adopted to enhance the growth of green building in South Africa. A qualitative research method was be adopted. The open-ended interviews were conducted with built environment professionals. The main barriers of green building implementation are: initial high cost, lack of awareness, lack of incentives, and resistance to change. Recommendations to enhance the growth of green building practices in South Africa include: updating building codes, expanding training programs, fostering collaboration between the public and private sectors, offering financial incentives, promoting the re-purposing of existing structures, and using performance-based contracts. The paper has highlighted the key barriers of green building implementation in South Africa and developed a database of the relevant studies which can further guide future researchers, stakeholders and policymakers in this area.
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    Evaluating the new universities project outcomes using the PMBOK project performance domains
    (University of the Witwatersrand, Johannesburg, 2024-07) Mosalaesi, Tsholofelo; Laryea, Samuel; Laryea, Samuel; Li, Baizhan; Essah, Emmanuel Adu; Mensah, Sarfo; Liu, Hong; Yao, Runming
    The Project Management Institute (2021) PMBOK Guide seventh edition presents eight essential domains or activities that are crucial to ensure the success of a project. PMI (2021) defines these Project Performance Domains as a group of related activities that are critical for the effective delivery of project outcomes. The PMI’s new focus on performance and project outcomes marks a significant shift away from traditional project management tools and techniques. This paper uses the eight PPDs as a framework to determine the critical factors that enabled the success of the new universities project based on the eight domains. A completed project with comprehensive data was used for the analysis. Hence, data from the project close out report was analysed using the thematic analysis method to identify the key project performance practices that were formulated and implemented to successfully achieve the intended outcomes. The key success factors identified relate to the role of the client as a leader, stakeholder’s productive working relationship and the delivery of the project within 1% of the control budget. There may be a common assumption that all clients may employ project managers who may possess the skills to execute these critical functions successfully. However, this is not always the case on all projects, and there is also varying degrees of competency among project managers. Therefore, clients should ensure that those playing leadership roles in their projects are well equipped to perform these critical functions successfully as a condition to achieve better infrastructure project outcomes.