Okoye, P U; Okolie, K C and Odesola, I A (2022) Risks of implementing sustainable construction practices in the Nigerian building industry. Construction Economics and Building, 22(1), pp. 21-46. ISSN 2204-9029
Abstract
This study assessed the risks level associated with implementation of sustainable construction practices through a questionnaire survey distributed to 256 building professionals in Nigeria. It identified 47 risk factors with different likelihood of occurrence and magnitude of impacts. A quantitative risk analysis result based on mean value method and risk prioritisation number showed that the three top-ranked risk factors with highest likelihood of occurrence were unavailability of sustainable materials and equipment, more complex and unfamiliar construction techniques and processes, and high initial sustainable construction costs; whereas the three top-ranked risk factors with highest magnitude of impacts were high initial sustainable construction costs, poor and inefficient communication among project participants, and high cost of sustainable materials and equipment. The criticality index result identified 23 critical risk factors which mostly related to knowledge and awareness, cost, regulatory framework, building materials and socioeconomic issues. However, the Wilcoxon Signed-rank test result indicated that there is significant difference (z = -3.207, p<0.001) between the likelihood of occurrence and magnitude of impacts of the risks factors associated with implementation of sustainable construction practices in Nigeria of which the effect was moderate (r = 0.468). Furthermore, the study revealed that there is no significance difference in the risk level of the risk factors associated with implementation of sustainable construction practices based on the respondents' roles (p>0.05). The study, therefore, recommended for training of construction practitioners in the multi-risk management approaches and increasing awareness through education on sustainable construction concept for building industry stakeholders. It further recommended for developing of new sustainable and affordable building materials through research institutes like Nigerian Building and Road Research Institute (NBRRI) with appropriate regulatory and policy frameworks for successful sustainable building projects.
| Item Type: | Article |
|---|---|
| Uncontrolled Keywords: | building industry; building professionals; implementation; risk; sustainable construction |
| Index terms: | sustainable building, building industry, building professional, building material, risk factor, risk management, quantitative risk analysis, questionnaire, implementation, sustainable material, risk prioritization, sustainable construction, sustainable construction practice, research institute, survey, construction practitioner, Nigeria |
| Subjects: | Geography, financial risk, sustainable construction, professional development, industry analysis, environmental hazards, research organizations, risk assessment, profession, data collection methods, sustainable materials, building materials, contractual arrangements |
| Topics: | Design Practice, Roles and Professions, Risk Management, Procurement, Sustainability, Cost Management, Geographical Context, Research Practice, Construction Materials, Information Management |
| Descriptive scope: | 4 PCEA |
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