Search Results (107)

This study investigates critical research gaps in procurement management challenges faced by Chinese contractors in international engineering–procurement–construction (EPC) projects under the Belt and Road Initiative (BRI), with a particular focus on sustainability-oriented outcomes. It examines the following: (1) prevalent procurement inefficiencies, such as communication delays and material shortages, encountered in international EPC projects; (2) the role of supply chain INTEGRATION in enhancing procurement performance; (3) the application of social network analysis (SNA) to reveal inter-organizational relationships in procurement systems; and (4) the influence of stakeholder collaboration on achieving efficient and sustainable procurement processes. The findings demonstrate that effective supply chain integration significantly improves procurement efficiency, reduces delays, and lowers costs, thereby contributing to more sustainable project delivery. Strong collaboration and transparent communication among key stakeholders—including contractors, suppliers, subcontractors, and designers—are shown to be essential for mitigating procurement risks and supporting resilient supply chain operations. SNA results highlight the critical roles of central stakeholders and their relational structures in optimizing resource allocation and enhancing risk management capabilities. Evidence from case studies further indicates that Chinese contractors increasingly adopt sustainability-oriented practices, such as just-in-time inventory management, strategic supplier relationship management, and digital procurement platforms, to reduce inefficiencies and environmental impacts. Overall, this study underscores that supply chain INTEGRATION, combined with robust stakeholder collaboration, is a key enabler of sustainable procurement and long-term competitiveness for Chinese contractors in the global EPC market. The purpose of this study is to identify critical procurement management challenges and propose evidence-based solutions for Chinese contractors. It further aims to develop a sustainability-oriented framework integrating supply chain integration and stakeholder collaboration to enhance competitiveness. Full article

Achieving sustainable delivery is a critical goal in international engineering projects, which involve interdependent actors—such as contractors, suppliers, and designers—engaged in simultaneous cooperation and competition. This study investigates how coopetition, conceptualized as intensity and balance, affects sustainable delivery performance through dynamic capabilities. Specifically, we introduce exploitation and exploration as mediating capabilities and examine their effects under coopetition structures (horizontal vs. vertical). We use hierarchical regression analyses, relationship critical tests, and the fuzzy set qualitative comparative analysis (fsQCA) approach. Using survey data from 172 global projects, the results show that exploitation and exploration partially mediate the relationship between coopetition intensity and sustainable delivery performance, and fully mediate the effect of coopetition balance. The analysis uncovers a structural differentiation in capability efficacy, showing that exploitation yields stronger effects within horizontal structures, whereas exploration exerts greater influence under vertical structures. fsQCA reveals three complex configurational pathways to sustainable delivery performance, demonstrating the compensatory configurational pathways in which structural characteristics can, under certain conditions, substitute for dynamic capabilities. This study extends the application of coopetition and dynamic capability theories to the context of international engineering projects and underscores the crucial role of governance structures in shaping capability development and sustainable delivery outcomes. Full article

Pakistan’s construction sector exhibits a disproportionate safety burden, accounting for 19.7% of workplace accidents despite comprising only 9.5% of the industrial workforce. While prior studies have diagnosed safety culture deficiencies through qualitative assessments, behavioral interventions, and risk identification approaches, no research has provided quantitatively prioritized intervention recommendations integrating regulatory mechanisms across project lifecycle phases with role-specific training programs. Grounded in Hudson’s safety culture maturity model and Reason’s organizational accident theory, this study employed a quantitative survey methodology to prioritize regulatory and training interventions for safety culture improvement. A 43-item questionnaire was administered to 105 construction industry professionals across client organizations (21%), contractor firms (30%), and consulting companies (49%) using stratified purposive sampling. Data were analyzed using Relative Importance Index calculations, supplemented by Kruskal–Wallis tests and correlation analyses, with instrument reliability being confirmed through Cronbach’s alpha (α = 0.859). Key findings reveal that 75.2% of respondents reported absence of safety culture implementation at project sites. Stakeholder effectiveness analysis identified sponsoring agencies (RII = 0.869) and regulatory authorities (RII = 0.819) as primary safety culture drivers, with clients demonstrating the lowest influence (RII = 0.568). Training prioritization established personal protective equipment utilization (RII = 0.886) and basic induction protocols (RII = 0.850) as critical worker competencies, while managerial requirements emphasized site-specific briefings (RII = 0.821) and incident protection training (RII = 0.808). Regulatory intervention priorities included safety credit points for contractor licensing (RII = 0.737) and departmental safety manual integration into contracts (RII = 0.726). These findings provide quantitative prioritization to guide resource allocation for safety culture interventions, although the descriptive methodology constrains causal inference regarding intervention effectiveness. Full article

Building Information Modelling (BIM) has increasingly transformed global architectural and construction practices by enhancing collaboration, design accuracy, and project efficiency. However, BIM adoption remains slow in several developing countries, including Nigeria, where architectural firms play a critical role in driving digital transformation across the wider construction sector. This study investigates the current level of BIM implementation within Nigerian architectural practices and identifies key factors that either enable or constrain its uptake. Survey findings (77 responses; 77% response rate), analysed using SPSS 26.0 and the Relative Importance Index (RII), reveal that although some firms have begun integrating BIM tools, many still rely heavily on traditional 2D CAD (Computer-Aided Design) workflows. Major barriers include high software acquisition and maintenance costs, limited technical expertise, and insufficient organisational readiness. The results highlight the urgent need for government incentives, targeted capacity-building programmes, and industry-wide digital skill development to accelerate BIM diffusion among architectural firms, whose early adoption is essential for sector-wide modernisation. Future research should explore how socio-technical alignment can reshape BIM-enabled workflows to generate measurable value for clients, contractors, and end users. Examining collaborative data environments, information exchange standards, and participatory design practices will be crucial for demonstrating BIM’s long-term return on investment and establishing sustainable digital transformation pathways within Nigeria’s architectural and construction industries. Full article

As a vital component of urban transportation systems, subways play a crucial role in the development of a city. However, opportunistic behaviors by subway construction contractors frequently occur, adversely affecting project objectives. This study employs literature review methods to identify six key dimensions that influence the governance of opportunistic behaviors by subway project contractors, thereby constructing a theoretical model of governance factors. Based on this theoretical framework, hypothesis testing and questionnaire design were conducted. Structural Equation Modeling (SEM) path analysis identified construction process management as the direct cause influencing the governance of opportunistic behavior by subway project contractors, exerting a direct effect on such governance. Meanwhile, industry standardization, external oversight mechanisms, project governance quality, contractor credit evaluation, and internal organizational controls within the construction firm were identified as indirect governance factors. A system dynamics model was employed for dynamic simulation analysis of the governance system, revealing the dynamic evolution of opportunistic behavior governance levels under various influencing factors. Scenario simulations identified the pathway, industry standardization → internal controls within the construction organization → project governance quality → construction process management → opportunistic behavior governance, as yielding the lowest frequency of opportunistic behavior occurrence and optimal governance levels. The findings provide a governance basis for addressing the frequent occurrence of opportunistic behavior in subway construction projects. Full article

This study investigates the bond strength of fifteen cement-based adhesive mortars used for expanded polystyrene (EPS) in External Thermal Insulation Composite Systems (ETICS). Field surveys and contractor interviews (170 questionnaires) found that adhesive layer thicknesses in real applications typically range from 15–20 mm and frequently exceed 20 mm, in contrast to the smaller values most often recommended by guidelines and technical instructions. Laboratory testing was conducted using two approaches: the standardized pull-off procedure according to EAD 040083-00-0404 (EAD and EAD′ variants) and an in-house pull-off procedure designed to reflect practical conditions of substrate type (concrete slab, silicate block), substrate orientation (horizontal, vertical), and adhesive layer thickness (10 and 20 mm). The results showed that adhesive bond strength is strongly influenced by adhesive layer thickness, substrate type, and substrate orientation. Increasing thickness from 10 mm to 20 mm on concrete substrates typically reduced bond strength by about 65–75%, while vertical orientation lowered adhesion to about half of that obtained in horizontal placement. Silicate substrates exhibited generally lower bond strength but higher variability, occasionally with ratios above unity due to their greater porosity. In some configurations, detachment occurred already during specimen preparation, underlining the variability of performance. The combined effect of increased thickness and vertical orientation on concrete substrates reduced adhesion by about 85% compared to the 10 mm horizontal baseline, highlighting the severity of unfavorable application conditions, whereas on silicate blocks, the effect was weaker but accompanied by large variability. The findings indicate that adhesive layer thickness has a stronger impact on bond strength than orientation and that substrate properties play an important role. The study provides a comparative perspective on current and alternative testing approaches, revealing significant differences in the results. The author’s testing method makes it possible to account for, in laboratory conditions, primarily the geometric shape and orientation of samples that are close to the actual form of adhesive mortar application in real insulation installations. This allows for the assessment of the properties of mortars and substrates that were not exposed under the conditions of current testing methods. The above provides a basis for further discussion on the inclusion of realistic application conditions in the evaluation of adhesive mortars used for bonding thermal insulation in ETICS, and for the validation assessment of an additional testing method, which is currently of an experimental nature. Full article

Elite capture, a power structure problem involving rent-seeking, hinders sustainable water resources management. Governments play crucial roles in instilling public legitimacy in water governance, a common-pool resource that benefits from cooperative solutions such as pilot competitions, co-monitoring, and inter-agency coordination. A study of South-to-North Water Diversion Projects in China showed how, when governments outsource small projects to local sub-contractors, a method named moderate supervision (ruo jiandu) can enable effective oversight, which is superior to a bidding model with strict supervision (qiang jiandu). The concept of moderate supervision was initiated in 2023, before which most small projects had been left in a risky state with no supervision (ling jiandu). Analysis of a case in Shandong Yellow River Water Diversion Irrigation Area involved semi-structured in-depth interviews. Findings revealed that an elite-government-villagers tripartite spiral was composed of 3 dimensions reshaping a positive elite culture: first, a whitelist of qualified local contractors; second, co-monitoring of multiple stakeholders with influence exerted by a three-tier mobilization system; third, inter-agency coordination innovatively enabling smooth functioning between policy entrepreneurs of formal institutions and local social governance of informal ones. Policy implications to underscore real-world applicability are provided. Full article

The success of civil infrastructure projects hinges on effective project management. Building on the PMBOK^® Guide framework, this study investigates how project management knowledge areas are used in practice and how their use relates to the integration of sustainability and risk-management principles. 272 construction professionals in Türkiye were surveyed and their responses were analyzed using reliability testing, normality checks, and a combination of non-parametric tests (Mann–Whitney U, Kruskal–Wallis) and ANOVA. There were found significant differences in perceived use of knowledge areas by education level, project role, project profile, and prior project-management training; in applied practice, company profile explains variation, whereas project type does not. The results indicate that wider, more systematic adoption—particularly in integration, schedule/time, quality, and risk—supports transparent, traceable processes aligned with sustainability objectives. These behavioral determinants were interpreted as enablers of life-cycle sustainability assessment and risk-informed decision making across civil-infrastructure contexts. There were discussed managerial and policy implications for asset owners and contractors, identifying leverage points for training and capability building, and outlining how standardized use of PMBOK knowledge areas can accelerate sustainability assessment and risk analysis in practice. Full article

The linear construction model is characterized by resource-intensive processes that generate significant waste, whereas adopting circular economy principles facilitates sustainable, adaptable, and recyclable building practices to mitigate waste and conserve resources. The primary objective of this study is to empirically analyze the impact of barriers and drivers on sustainable construction practices and to evaluate the role of organizational culture in moderating this relationship. This study, grounded in Circular Economy theory, distributed 210 questionnaires using simple random sampling to large contractors (501–3000 employees) in Saudi Arabia’s Eastern Region, yielding 154 acceptable responses and a 73% completion rate. Data analysis was conducted using SmartPLS software, revealing that barriers, drivers and organizational culture positively impact sustainable construction practices, with organizational culture also positively moderating the connection among drivers and sustainable construction practices. However, organizational culture was not observed to substantially influence the connection between barriers and sustainable practices. The results highlight the main contribution of organizational culture in supporting sustainable development, offering significant theoretical contributions and practical implications for industry leaders and policymakers to develop regulatory framework and implement strategies that support sustainability. Full article

Construction site layout planning (CSLP) plays a pivotal role in determining the overall efficiency and cost-effectiveness of construction projects. Material handling operations, which constitute a significant portion of indirect project costs, heavily depend on the spatial arrangement of temporary facilities such as site offices, storage yards, and equipment zones. Poorly planned layouts can lead to excessive travel distances, increased material handling times, and operational delays, all of which contribute to inflated costs and reduced productivity. Therefore, optimizing the layout of construction sites to minimize transportation distances and enhance workflow is a critical task for project managers, contractors, and other stakeholders. The challenge in CSLP lies in the complexity of simultaneously satisfying multiple, often conflicting, requirements such as space constraints, safety regulations, and functional proximities. This complexity is compounded by the dynamic nature of construction activities and the presence of numerous facilities to be allocated within limited and irregularly shaped site boundaries. Mathematically, this problem can be formulated as a Quadratic Assignment Problem (QAP), a well-known NP-hard combinatorial optimization problem. The QAP seeks to assign a set of facilities to specific locations in a manner that minimizes the total cost, typically modeled as the sum of products of flows (e.g., material movement) and distances between assigned locations. However, due to the computational complexity of QAP, exact solutions become impractical for medium to large-scale site layouts. In recent years, metaheuristic algorithms have gained traction for effectively tackling such complex optimization problems. Among these, the Advanced Jaya Algorithm (A-JA), a recent population-based metaheuristic, stands out for its simplicity, parameter-free nature, and robust search capabilities. This study applies the A-JA to solve the CSLP modeled as a QAP, aiming to minimize the total weighted travel distance of material handling within the site. The algorithm’s performance is validated through two realistic case studies, showcasing its strong search capabilities and competitive results compared to traditional optimization methods. This promising approach offers a valuable decision-support tool for construction managers seeking to enhance site operational efficiency. Full article

As one of the main sources of global greenhouse gas emissions, the low-carbon transformation and emission reduction in the construction industry are inevitable requirements for addressing climate change. Under cap-and-trade regulations, Carbon emission rights have become a key production factor. However, the price of carbon emission rights is highly random. Taking the EU carbon market in 2024 as an example, the carbon price fluctuated by more than 35%, soaring from 65 euros per ton to 80 euros per ton and then falling back. Such sharp fluctuations not only increase the cost uncertainty of enterprises but also complicate the investment decisions for emission reduction. Therefore, enterprises can enhance the flexibility of carbon emission rights trading decisions through option strategies, helping them hedge against the risks of carbon price fluctuations, and at the same time improve market liquidity and risk management capabilities. Against this background, based on the carbon cap-and-trade policy, this paper introduces the two-way option strategy into the construction supply chain game model composed of general contractors and subcontractors, and studies to obtain the optimal carbon reduction volume, carbon option purchase volume, maximum expected profit of general contractors, subcontractors and profit distribution ratio. This study shows that two-way options play a crucial role in optimizing supply decision-making and emission reduction strategies. Under the decentralized model, emission reduction responsibilities are often shifted to subcontractors by the general contractor, resulting in a decline in overall mitigation effectiveness. Furthermore, appropriately lowering the carbon emission benchmark can strengthen enterprises’ incentives for emission reduction and significantly enhance the profitability of the supply chain. The study further suggests that general contractors should enhance their competitiveness by developing environmentally friendly technologies and improving their ability to reduce emissions on their own. Meanwhile, subcontractors need to actively participate in the collaborative efforts through revenue-sharing contracts. This study reveals the strategic value of two-way carbon options in construction supply chain carbon trading and provides theoretical support for the formulation of carbon market policies, contributing to the low-carbon transition of the construction supply chain. Full article

Contemporary construction faces the need to reduce its negative impact on the environment, prompting designers, investors, and contractors to seek more sustainable materials and technologies. One area of dynamic development is the use of natural fibers as an alternative to conventional, often synthetic, building components. Plant- and animal-based fibers, such as hemp, flax, jute, straw, bamboo, and sheep’s wool, are characterized by low energy consumption in production, renewability, and biodegradability. Their use is in line with the concept of a circular economy and reduces the carbon footprint of buildings. Natural fibers offer a number of beneficial physical and functional properties, including good thermal and acoustic insulation parameters, as well as hygroscopicity, which allows for the regulation of indoor humidity, improving air quality and comfort of use. In recent years, there has also been a renaissance of traditional building techniques, such as straw construction, often combined with modern engineering standards. Their potential is particularly recognized in green and energy-efficient construction. The article provides an overview of the types of natural fibers available for use in construction and analyzes their technical, environmental, and economic properties. It also draws attention to current regulations, standards, and certifications (e.g., LEED, BREEAM) that promote the popularization of these solutions. In light of the analyzed data, the role of natural fibers as a viable alternative supporting the transformation of the construction sector towards sustainable development is considered. Full article

The Norwegian construction sector has long struggled with conflict, particularly in large-scale and complex projects, where adversarial practices, rigid procurement systems, and insufficient early collaboration are common. This study explores how partnering contracts, which are collaborative delivery models designed to align stakeholder interests, affect conflict dynamics in real-world settings. Employing a mixed-methods approach, it combines semi-structured interviews with 21 experienced Norwegian construction professionals and a structured survey of 33 industry experts. The findings reveal that partnering can foster trust, improve communication, and reduce adversarial behavior through mechanisms such as early contractor involvement, joint goal setting, and open dialogue. However, participants also identified critical risks: superficial collaboration rituals, ambiguous roles, and unresolved structural inequalities that can exacerbate tensions. Importantly, the study emphasizes that partnering success depends less on the contract itself and more on cultural alignment, stakeholder competence, and long-term relational commitment. These insights contribute to a more nuanced understanding of how collaborative contracting influences conflict mitigation in the Norwegian construction sector. Full article

In recent years, Europe has experienced an unexpectedly high frequency of natural disturbances. Private forest owners (PFOs), who manage a significant proportion of European forests and have diverse objectives and approaches to forest management, play a crucial role in salvage logging. The aim of this study was to (i) categorise PFOs based on their forest management objectives, experience with regular forest management, and responses to natural disturbances, and (ii) propose policy implications for particular PFO groups to improve salvage logging operations and meet legal requirements. A survey was conducted among a random sample of PFOs whose forests were affected by natural disturbances (n = 547). The survey data were analysed using K-means cluster analysis, and three groups of PFOs were identified. The outsourcing-oriented managers (32%) responded most strongly to natural disturbances, with 96.0% carrying out salvage logging. This highly co-operative group often relies on forest contractors and demonstrates the highest commitment to performing forest management activities among the three groups. The self-reliant managers (42%) also responded strongly (92.6% carried out salvage logging) and are characterised by a strong preference for performing the work themselves. The group of less active managers (26%) included the highest proportion of PFOs who did not conduct salvage logging (19.0%) and those with no previous forest management experience (12.0%). Despite these differences, common policy instruments based on smart regulation principles are proposed to promote efficient salvage logging. The results may contribute to the holistic transformation of forest policy and management in response to the current challenges posed by large-scale natural disturbances. Full article

The deficiency in competencies among built environment professionals (BEPs) in achieving sustainability goals presents a significant challenge, contributing substantially to the escalation of carbon emissions globally, with pronounced implications in Ghana. Addressing this issue is critical to bridging the existing knowledge gap concerning the role of key professional competencies in mitigating carbon emissions. This study, therefore, seeks to examine and synthesize the essential competencies required by BEPs to support the attainment of net-zero carbon emissions within the Ghanaian construction industry (GCI). A quantitative research approach was employed, utilizing a structured questionnaire survey to examine the opinions of 125 professionals, including architects, engineers, and construction managers. The questions were developed based on a review of the related literature. The data collected was analyzed using one-sample t-tests, multiple linear regression, and ANOVA to assess the significance and impact of the identified competencies on sustainability outcomes. The key competencies identified included “value engineering”, “stakeholder engagement for low-carbon development”, “circular impact assessment”, and “reverse logistics for sustainable material use”. This research also revealed the key competencies’ contributions to attaining environmental sustainability in the Ghanaian construction industry. Some key outcomes are “proper planning and provision of detailed net-zero carbon building specifications for contractors” and “promotion and implementation of net-zero carbon buildings”. It was identified that actions towards net-zero carbon emissions are the leading contributor to environmental sustainability, whereas the essential competencies have a greater impact on sustainable resource use. The findings highlight gaps in the current practices and underscore the need for improved professional training and development to meet sustainability goals. This study concludes that while professionals in the GCI are aware of sustainability objectives, significant improvements are needed in the application of sustainable practices. Full article