Modular construction (MC) has gained attention due to its potential for fast construction, reduced construction waste, and lower environmental impact while having several other issues on stimulating sustainability. The circular economy (CE) focuses on better resource management through a closed-loop system. Even though MC enhances sustainable practice, several pitfalls barricade sustainability in MC (high initial investment, design consideration, and technology challenges). Nevertheless, the synergy between CE and MC has not been investigated in past studies to address the issues in MC to achieve sustainability. This study investigates the integration of CE principles in MC to enhance sustainability. This study used a qualitative approach via the Delphi technique by conducting three semi-structured expert interview rounds with the use of a purposive sampling method. The collected data were analysed using manual content analysis. This study identified nine notable issues in MC to achieve sustainability, and all CE 9-R (rethink, refuse, reduce, reuse, repair, refurbish, remanufacture, recycle, and recover) principles could address those identified issues. Accordingly, thirty implementation strategies were recognised to fill the gap between the problems in MC and the potential of CE principles to solve the issues. The results provide insights for construction practitioners, policymakers, and researchers on integrating CE principles into MC processes to achieve sustainability goals. Ultimately, this study highlights the significance of a holistic approach by theoretically combining MC and CE principles as a benchmark for future studies. As a contribution, CE strives to make the planet a safe place to live by combatting resource depletion.

Sustainable construction has become a feasible solution for overcoming various social, economic and environmental issues faced by the construction industry. Because of the vital role quantity surveyors play in construction, involvement in sustainable construction has become essential. However, there is a literature gap and an industry need to identify how quantity surveying inputs can contribute to sustainable construction. This study, therefore, aimed to identify the significance of quantity surveying competencies in sustainable construction in Sri Lanka. A literature review was first carried out followed by interviews and a questionnaire survey. The findings revealed that construction technology and environmental services; computer literacy; ethics and professional practice; leadership and management; and measurement and costing as areas in sustainable construction which are significant to quantity surveyors, and therefore, competencies in these areas need to be developed. The research ranked sustainable approaches and sustainable techniques based on the significance of their associated quantity surveying inputs. The research recommends construction technology and environmental services; computer literacy; ethics and professional practice; leadership and management; and measurement and costing as areas in which competencies of quantity surveyors need to be given consideration in sustainable approaches and sustainable techniques. Quantity surveyors possessing these competencies will enhance sustainable construction.

Purpose: Quantity surveying education in Sri Lanka (SL) presently does not appear to be catering to the industry needs indicating that it may not be up to the expected standard. Hence, the purpose of this study is to identify the gap between the competencies of graduate quantity surveyors (QSs) and the competencies that industry in SL expects from them.Design/methodology/approach: A hybrid approach was used, consisting of desk reviews, expert interviews and a questionnaire survey. A comparative analysis identifying differences between two competency levels was carried out.Findings: Analysis reveals that competencies of graduate QSs in areas of cost planning, strategic planning, risk management, value management, life cycle cost analysis, sustainability, surveying and levelling, research and development, building surveying and business management are at levels higher than industry needs. However, majority of competencies are at levels lower than industry expectations.Research limitations/implications: This research was focused only on competencies of QSs who have successfully completed a quantity surveying degree programme accredited by Institute of QSs SL, Royal Institution of Chartered Surveyors, Australian Institute of QSs and Pacific Association of QSs. It excluded non-graduates’ competencies as they gain competencies only through work experience.Practical implications: This study revealed the need for designing quantity surveying degree programmes to cater to industry needs to ensure that graduates from these programmes are acceptable to the industry.Originality/value: This study made an original contribution to knowledge by identifying the gap that currently exists between industry needs and programme outcomes of quantity surveying degree programmes, which could be invaluable when improving quantity surveying education in SL.

Purpose: In a conventional sense, information technology has frequently been considered a source of Lean waste management. However, as the corporate world evolves, new models that provide a competitive edge by merging technical breakthroughs with the Lean paradigm must be developed. Enterprise resource planning (ERP), which is such technological advancement, is found to be highly influential for Lean implementation. However, there is a dearth of literature on the adaptability of ERP to minimise Lean waste in the construction industry. This paper, therefore, aims to investigate the possibility of applying ERP to minimise Lean waste in the construction industry.Design/methodology/approach: The study used a qualitative approach, consisting of fifteen (15) expert interviews and code-based content analysis was used to analyse the empirical data.Findings: The findings revealed the challenges faced when applying ERP with the Lean concept and the strategies that would help overcome the challenges. Most of the challenges could be overcome through training and awareness programmes and proper team management. The study also found that ERP could be applied with Lean to eliminate waste generation in the construction industry.Originality/value: This paper contributes to the theory by providing an evaluation of the possibility of adopting ERP to eliminate Lean waste in the construction industry. The study will contribute to new knowledge related to strategies for proper use of ERP for Lean waste minimisation, which will be useful for future researchers in the area.

Purpose: Delays represent one of the most critical factors that affect the cost of a construction project. They have to be therefore analysed comprehensively using appropriate techniques. The purpose of this paper is to find out the delay analysis techniques (DATs) that are most commonly used in road projects in Sri Lanka, the extent of their usage, the criteria that can be used in selecting them and the technique that is most appropriate for the selection.Design/methodology/approach: The research methodology adopted included an extensive literature review, expert interviews and a questionnaire survey.Findings: In road projects in Sri Lanka, five types of DATs are mainly used. The “As-planned v. As-built Analysis” technique is the most commonly used technique while “Window Analysis” is the least used technique. Out of the nine criteria identified for selecting a DAT, the most important criterion is the acceptability of the technique to courts and tribunals. “Window Analysis” was found to be the most appropriate DAT that can be used in road construction projects in Sri Lanka.Originality/value: “Window Analysis” can be recommended as the most appropriate DAT for road projects in Sri Lanka.

Purpose: The construction industry is shifting towards becoming more circular by reducing waste, reusing building materials and embracing regenerative solutions for energy generation and biodiversity conservation. Thus, construction professionals must perform diversified services to achieve a circular built environment (CBE). Implementing resource planning and waste management in CBE has already posed challenges to the quantity surveying profession; thus, quantity surveyors (QSs) should be equipped with new roles and competencies to tackle challenges in achieving a CBE. Hence, this study aimed to investigate the functions and competencies of QSs at the design and building material sourcing stages in achieving a CBE according to 3R principles.Design/methodology/approach: The research apprehended a qualitative approach, including two expert interview rounds adhering to the Delphi technique with 14 and 11 experts per each round. Manual content analysis was incorporated to analyse the collected data.Findings: The research findings revealed the important roles and competencies of QSs in achieving a CBE. In addition, essential functions and competencies were categorised according to the 3R principles (reduce, reuse, recycle) to successfully implement CBE during the Design and Building Material Sourcing stages. According to the 3R principles of CBE, cost control, cost planning, feasibility studies, measurement and quantification, risk management, value engineering and innovations and technologies were well-received by most interviewees as essential roles of QSs during the Design and Building Material Sourcing stages. Further, basic/mandatory competencies (personal, interpersonal, professional practice and business skills), economic analysis, BIM management, cost management and risk management are highly regarded by experts for QS as important competencies to achieve CBE.Originality/value: With new construction trends, QSs must enhance their conventional roles and competencies and search for new skills and competencies. Those skills and competencies could be linked to the CE concept, either directly or indirectly. Since QS holds a prominent place in sustainable construction in CBE, adapting to changes in the construction industry such as CBE is timely for QSs. Further, there is a shortage of literature regarding QSs' roles and competencies in achieving a CBE; thus, this study will contribute by identifying new avenues for QSs in achieving a CBE in the practice and the research.