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The practice of the defects liability period (DLP) is a risk management strategy meant to secure durable and high-quality works. However, construction products continue to malfunction even after the expiration of DLPs. This study seeks to determine the adequacy of DLPs existing in the construction industry and propose appropriate DLPs for construction projects in the Ghanaian construction industry.

Applying quantitative research strategy, 124 questionnaires were retrieved from construction professionals surveyed. The data obtained were analysed using descriptive statistics, Cramer’s V and the significance test with the aid of Stata software.

It was found that defects start showing in both buildings and roads within 12 months after being handed over for the client’s use. The significance test and Cramer’s V analysis indicate low concordance amongst respondents that the 6–12 month DLPs existing in Ghana are adequate. It is found that the existing DLP practice does not provide sufficient security to clients.

Construction project clients will need to include the tenderer’s proposed DLP as part of the tender evaluation criteria with the objective of picking up a signal of the quality of work to be delivered.

This paper is one of the pioneering studies addressing the issue of the adequacy of DLPs in the construction industry in the Sub-Saharan Africa region. The findings trigger policy and regulatory changes in conditions guiding construction contracts procured in most developing countries that have adopted and adapted to the World Bank Public Procurement Guidelines.

The lack of carbon emission reduction strategies specifically devised for buildings in urban areas in developing countries has affected the global course of tackling carbon emissions. The purpose of this study is to identify the causes of carbon emissions from buildings in urban settings in Ghana and generate specific reduction strategies.

The study was conducted with reference to Kumasi Metropolis, an urban area in Ghana. Adopting a survey research design, data obtained from 106 built environment professionals (BEP) were analyzed using Garrett’s mean ranking and factor analysis (FA) techniques.

Urban buildings’ carbon emissions in the study area are attributable to construction, demolition energy consumption, technological and economic factors. The strategies emerging from the study emphasize organizational and governmental policy and regulatory factors, as well as the adoption of indigenous sustainable materials and technology.

BEPs and construction industry regulatory bodies will have to consider socioeconomic characteristics of a specific location in the development of organizational and localized carbon emission reduction policies.

Local authorities who plan economic activities such as trading and associated taxation in urban areas in developing countries should consider the climate change implications of such socioeconomic activities.

This is one of the first studies that has conceived carbon emission causes and reduction strategies within the context of a typical developing country’s urban setting to overcome the pragmatic challenges associated with past carbon emission reduction frameworks.

The purpose of this study was to determine the transaction cost (TC) contractors incur when tendering for a project as well as establish a correlation between the TC of tender and tender amount of projects procured through the national competitive bidding procurement method.

The research draws extensively documentary analysis, observation and interviews to collect cost data on 14 different tenders submitted by a D1/K1 contractor. Using TC theory, the data are analyzed and the actual cost is determined. Further, Spearman rank correlation is employed to establish a relationship between tender price (TP) and the cost of tender by the aid of Statistical Package for Social Sciences.

The research developed a tender preparation conceptual framework highlighting the components of TC in competitive tendering in Ghana and also revealed that, apart from the emotional and psychological costs, contractors in Ghana incur approximately Gh₵ 4,625 (US$ 925)–Gh₵ 2,520 (US$ 504) to prepare and submit a competitive tender. In relation to the tender figure, the TC of tender in Ghana ranges from 0.05% to 0.65% and an average of 0.33%. Also, there is an inverse correlation between TP and the percentage cost of tender.

The research relied on 14 competitive tenders and also limited to public sector works. Findings from the study should therefore be applied with caution.

This study is the only known research that has focused on assessing the TC of public sector competitive tendering from a contractor's perspective and within a developing sub-Saharan African context.

Social value (SV) is gaining traction worldwide. However, there are no clear strategies to drive SV where there is limited or no formal SV legislation. The purpose of this study is to determine the key drivers of SV through construction procurement practices in regions without formal SV laws.

Quantitative data on the SV drivers of construction projects were obtained from local government construction procurement operatives using a survey questionnaire. The analytic hierarchy process was applied to prioritise SV drivers. A one-sample t-test was used to determine the significance of the SV drivers. Subsequently, the Pareto technique was deployed to determine the key drivers of SV.

The key drivers of SV to consider during construction procurement are investment by project clients, the education and training of contractors and consultants and organisational planning and policy reformation.

The findings of this study will engender investment in sustainable projects and the integration of SV into construction practices to elevate industry standards, enhance corporate reputation and meet social expectations. The strategies identified in this study for promoting SV will foster community development through improved infrastructure, job creation and economic growth while supporting long-term sustainability and resilience.

The originality of this research lies in its context-specific insights into a country without formal SV legislation. The proactive measures identified, such as education and policy alignment, demonstrate a bottom-up approach for integrating SV into construction procurement. This contrasts with top-down legislative approaches seen in other contexts, providing a unique perspective on how SV can be driven in the absence of formal laws.

Over dependence on river/sea sand as building material has impacted the environment negatively. However, laterite, which is an environment-friendly indigenous building material in sub-Saharan Africa, has been less exploited as a suitable alternative. This paper aims to ascertain the optimum cement–laterite mix proportion at which laterite can be stabilized for production of walling units.

Using an experimental method, laterite was collected from three borrow pit sites. Sieve analysis was performed to determine the particle size distribution. Also, the degree of workability of the cement–laterite mix was ascertained using slump test. Compressive strengths were determined at cement stabilization percentages of 3%, 7% and 10% on 12 cubes of100 mm cast and cured for 14 and 28 days, respectively.

The results showed that the lateritic soil investigated, achieves its optimum strength in 28 days of curing, at a stabilization level of 10%. An average compressive strength of 2.41 N/mm2, which is 20.5% greater than the target strength, was achieved.

To meet the desired compressive strength of alternative walling units while achieving environmental sustainability and efficiency in production, cement stabilization of lateritic soils should become a recommended practice by built environment professionals in sub-Saharan Africa.

This paper is one of the first research works that attempts to determine the optimum level at which the abundant sub-Saharan laterite can be chemically stabilized for the production of non-load bearing walling units. This research promotes an environment-friendly alternative building material to sea sand, river sand and off-shore sand.

The purpose of this paper is to identify the risks associated with private sector participation (PSP) in power generation (PG) projects, how they were allocated and the strategies used to mitigate their likely adverse effects.

The paper adopts case study research method and cross-case analyses to unearth the key risks and the contractual instruments used to manage them.

The paper identified 30 risk factors associated with four major private sector PG projects in Ghana. The allocation and mitigation strategies of these risks are also reported.

This is the first study to create a risk register of PSP PG projects. Private investors and government have been provided with a comprehensive list of risks associated with PG infrastructure. Would-be investors have also been armed with some potential risk management strategies for proper project structuring.

This study aimed at developing and empirically testing a system dynamics causal loop (SDCL) model for investigating factors related to the risk of cost overruns, associated with the performance of construction projects in developing countries.

Using data derived from the Ghanaian construction industry (GCI), a conceptual system dynamics model was hypothesised and empirically tested.

Supported by empirical evidence, the study established that the low technical capacity of consultants is the underlying cause of cost overruns in government projects. There is a strong proof of the relationship between the results of the SDCL model and poor contract planning and supervision, change orders, competence of the project team and the lack of effective coordination amongst the contractual parties.

The final SDCL model has revealed key risk components that would require standard mitigation measures in order to achieve “acceptable success” in construction projects.

The study presents an interactive approach for construction practitioners in developing countries to prioritise the causes of cost overruns in order to initiate quick responses.

The purpose of this paper is to explore the various approaches prescribed in literature in the assessment of value for money (VfM) of public–private partnership (PPP) projects with the aim to develop a theoretical framework for measuring VfM in Ghana.Public–private partnership (PPP) has long been recognized as an effective way of procuring public infrastructure to deliver value for money, but the subject has received little research attention in Ghana.

The methodology comprises a multi-stage critical review of relevant literature; review of Ghana’s National Policy on PPP and review of the Public Procurement Act, 2003 (Act 663). This paper was underpinned by an interpretivist philosophy and is inductive in nature.

The approach for VfM assessment largely depends on the jurisdiction of the project. Multiple methods (qualitative and quantitative) are used along the project cycle in the bid to achieve VfM. The most common assessment approaches include public sector comparator shadow bid, lease-purchase analysis, cost benefits analysis, public interest test central guidelines and competitive bidding. The study developed a theoretical framework for assessing VfM in Ghana.

The research was purely exploratory and non-empirical; and hence cannot be generalized in a broader context.

Implementation of the National PPP policy and for PPP to thrive in Ghana, a framework to guide the assessment and achievement of VfM is crucial. The steps outlined if followed would help ensure the public receives the best of all PPP deals in Ghana.

This paper is unique providing insights into a conceptual basis for assessing VfM and provides a basis for future empirical study.

Corruption continues to be a pervasive stain on the construction industry in developing countries worldwide, jeopardising project performance and with wide-ranging negative implications for all facets of society. As such, this study aims to identify and analyse the causes of corruption in the construction sector of an emerging economy such as Malaysia, as it is crucial to uncover the specific facilitating factors involved to devise effective counter strategies.

Following a detailed literature review, 18 causes of corruption are identified. The results of an opinion survey within the Malaysian construction industry are further reported to rank and analyse the causes. The factor analysis technique is then applied to uncover the principal factors involved.

The results indicate that all the considered causes are perceived to be significant, with the most critical causes being avarice, relationships between parties, lack of ethical standards, an intense competitive nature and the involvement of a large amount of money. A factor analysis reveals four major causal dimensions of these causes, comprising the unique nature of the construction industry and the extensive competition involved; unscrupulous leadership, culture and corruption perception; a flawed legal system and lack of accountability; and ineffective enforcement and an inefficient official bureaucracy.

The study presents the Malaysian construction industry’s view of the causes of corruption. Therefore, the arguments made in the study are influenced by the social, economic and cultural settings of Malaysia, which may limit generalisation of the findings.

This paper helps stakeholders understand the root causes and underlying dimensions of corruption in the construction industry, especially in Malaysia. Recommendations for changing cultures that may be conducive to corrupt practices, and anti-corruption measures, are suggested based on the findings of the research.

These findings can guide practitioners and researchers in addressing the impediments that give rise to the vulnerability of the construction industry to corrupt practices and understanding the “red flags” in project delivery.

Blockchain is an emerging digital technology proposed and trialled among different built environment professions. The technology has been proposed to introduce transparency, security and trust in property transactions. Despite this proposition, few studies have analysed the barriers and prospects in property valuation, especially in markets plagued by low transparency and a lack of stakeholder trust. Using Nigeria as a case study, this study assesses the barriers and prospects for adopting blockchain technology in property valuation.

Data was collected from 180 valuers practising in Nigeria through an online survey, and the data was analysed using mean score ranking and the chi-square (χ²) test of independence.

Firstly, there was a low awareness of the application of blockchain technology and an association between the number of valuation jobs executed annually and awareness of the application of blockchain technology. The most important barriers revolved around the knowledge, technical know-how of blockchain and the cost of implementing such technology. The prospects for blockchain are very high as all identified prospects were considered important, with transparency being the most crucial factor for its adoption, followed by the monitoring activities in real time and the permanence in storing records.

This study's implications lie in the potential benefit of transparency identified for blockchain, which could act as a tool to introduce transparency into valuation industries that battle key issues surrounding transparency and trust. Furthermore, this study can be utilised by policymakers and property industry players in mapping strategies to adopt the beneficial use of blockchain as one among the suite of proptech tools disrupting the property valuation scene, in their practice. This also presents an opportunity to draw upon insights from this study to better prepare for using blockchain in property valuation.

This study appears to be the first to empirically assess barriers and prospects for blockchain in property valuation practice. It contributes to the literature by identifying key factors that will deter and/or promote the application of blockchain, an emerging and disruptive digital technology.