Browsing by Author "Rotimi JOB"

Now showing 1 - 20 of 50
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    A framework for sub-contractor integration in alliance contracts
    (2012) Vilasini N; Neitzert T; Rotimi JOB; Windapo AO
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    A guideline for BIM and lean integrated construction practice
    (Emerald Publishing Limited, 2025-04-09) Likita AJ; Jelodar MB; Vishnupriya V; Rotimi JOB
    Purpose This study proposes a guideline for integrating Building Information Modelling (BIM) technology and lean construction practices to address the construction industry’s challenges in transitioning to environmentally friendly developments. Design/methodology/approach This study employs a qualitative research method, integrating and validating lean principles with BIM tools by extensively analysing previous studies. Subject matter expert interviews were conducted to validate the findings and create conceptual maps. Thematic and content analyses were performed to develop the proposed guidelines and recommendations. Findings The study highlights the potential of integrating BIM and lean construction practices to enhance productivity and reduce waste. The proposed guidelines provide practical recommendations for improving the implementation of BIM and lean practices, offering a structured approach for stakeholders to address critical challenges. Research limitations/implications While this study provides valuable insights, it primarily focuses on the New Zealand (NZ) context. Future research could explore the applicability of the proposed guidelines in different regions and consider quantitative validation methods to strengthen the findings. Originality/value This research contributes to the field by providing a novel guideline for integrating BIM and lean construction practices, addressing critical implementation challenges. The study offers valuable insights for global construction practices aiming to adopt advanced management approaches.
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    A rank order of determinants of construction organisation's performance in New Zealand
    (Massey University, 2020) Alqudah HE; Poshdar M; Tookey J; Rotimi JOB
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    A study of design change management for infrastructure development projects in New Zealand
    (MDPI AG, 19/09/2022) Wang R; Samarasinghe DAS; Skelton L; Rotimi JOB
    Design changes seem to be an inevitable part of engineering, procurement and construction EPC projects. Such changes create a need for a proactive approach to adjusting project scope, cost and time (the triple constraints) for efficiency and effectiveness in overall delivery. This study investigates the causes and implications of design changes in order to improve design change management practices. Data for the study were obtained through online interviews with New Zealand industry practitioners. Thematic analysis was used to collate the results into meaningful data. The study found that design changes were predominantly caused by clients’ inadequate strategic planning, insufficient attention to design, EPC contractors’ inadequate design ability, and on-site variations. There were three categories of such design changes: direct impact on the project, the reciprocal and complementary effect on stakeholders, and the far-reaching impact on the community. The study concludes by suggesting improvements, such as strengthening the integration of project teams to enhance design quality, strategic alignment of stakeholders at the planning stage, early contractor involvement (ECI) between the planning and design phases, and improving collaboration between design and construction teams. Further, a combination of high technical skills (e.g., design ability) and soft skills (can-do attitude, interpersonal skills, problem-solving skills, documentation skills, etc.) are needed to generate the desired improvement in design change management.
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    A Study of Design Change Management for Infrastructure Development Projects in New Zealand
    (MDPI (Basel, Switzerland), 2022-09-19) Wang R; Samarasinghe DAS; Skelton L; Rotimi JOB
    Design changes seem to be an inevitable part of engineering, procurement and construction EPC projects. Such changes create a need for a proactive approach to adjusting project scope, cost and time (the triple constraints) for efficiency and effectiveness in overall delivery. This study investigates the causes and implications of design changes in order to improve design change management practices. Data for the study were obtained through online interviews with New Zealand industry practitioners. Thematic analysis was used to collate the results into meaningful data. The study found that design changes were predominantly caused by clients’ inadequate strategic planning, insufficient attention to design, EPC contractors’ inadequate design ability, and on-site variations. There were three categories of such design changes: direct impact on the project, the reciprocal and complementary effect on stakeholders, and the far-reaching impact on the community. The study concludes by suggesting improvements, such as strengthening the integration of project teams to enhance design quality, strategic alignment of stakeholders at the planning stage, early contractor involvement (ECI) between the planning and design phases, and improving collaboration between design and construction teams. Further, a combination of high technical skills (e.g., design ability) and soft skills (can-do attitude, interpersonal skills, problem-solving skills, documentation skills, etc.) are needed to generate the desired improvement in design change management.
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    Achieving design-stage elemental cost planning accuracy: Case study of New Zealand
    (2017) Adafin J; Rotimi JOB; Wilkinson S; Windapo AO
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    An evaluation of risk factors impacting project budget performance in New Zealand
    (Emerald Publishing Limited, 3/03/2021) Adafin J; Rotimi JOB; Wilkinson S
    Purpose There has been a lack of research, particularly within the New Zealand (NZ) context, focusing on the identification and assessment of risk factors for construction projects, leading to a wide variation between design-phase elemental cost plans (ECPs) and the outturn tender sums (OTS). Still to be investigated is how risks interact to produce such variability. This study aims to determine the risk-influencing factors, identified through risk measurement, during design development. Design/methodology/approach This study adopted literature review and online questionnaire survey. The literature review was used to identify the factors affecting project budgetary performance, which was used to design the questionnaire survey culminating in data analysis. The questionnaire was administered to 64 practising project managers (PMs) in NZ. Their responses were analysed using descriptive statistics, mean ranking analysis, degree-of-risk measure and correlational analysis, to find the top-five risk factors impacting the variability observed, through ranking the mean and degree of risk values that produce such variability. Findings Significant risk factors were identified from the questionnaire survey analysis, such as changes in project owner/stakeholder requirements, experience of project team, site condition information, competency of consultants and information flow and quality. These provided some insights in explaining the variability between the design-phase ECPs and OTS based on risk impacts from PMs’ viewpoints. Research limitations/implications Findings revealed a drift of 23.86% in budgeted costs (inflated risks), which seems significant. Prioritising top risk factors may provide handy information for researchers on the variables that could be relied upon for the development of a forecasting model for application in NZ. Practical implications The study findings have implications for PMs seeking to provide information on mitigation strategies by using risk management approach, considering the influence of development risks on building project delivery and, consequently the project owner’s financial position. To guard against wide variation between design-phase ECPs and OTS, the main contribution of this study is to raise consultants’ awareness of the important risk factors for their planning at the outset, thus assisting PMs in pro-actively managing their clients' budgets. Originality/value This study creates value by synthesising literature on construction project budgeting and highlighting areas for further research. By giving adequate attention to key risks associated with budget overruns in commercial projects, variability between ECPs and OTS, a common phenomenon in NZ, can be controlled to achieve cost savings. Based on this, further study suggests the development of a model that could assist the stakeholders in NZ to more reliably predict OTS from the design-phase ECP and pro-actively avoid unfortunate budget/cost overruns, disputes and even project abandonment.
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    Analysis of the influence of a strategy-led planning approach on successful construction project implementation
    (University of Technology Sydney (UTS) ePress, 2015) Rotimi JOB; Ramanayaka CDD
    This paper presents arguments for the development of a strategy-led approach to planning and implementation of construction projects. It takes the position that there are deficiencies in traditional planning algorithms, which make them inefficient to cope with the unique character of construction projects. Thus a combination of construction project strategies crafted from experiential knowledge (reflective practice methodologies) and traditional planning algorithms are needed for successful construction project planning and implementation. To confirm the argument, the study investigates the influence of strategies on 35 critical success factors which were identified through literature. It uses a combination of data collected through a questionnaire survey of 40 NZIOB Excellence award recipients for the period 2001 to 2011, and interviews with three subject matter experts to validate the influence of the strategy-led approach towards some selected critical success factors. A correlation analysis shows that there is a positive relationship between increasing project complexity and the use of strategies. Further, content analysis of study information collected suggests that complementary approaches herein referred to as the strategy-led approach is needed to achieve successful project outcomes.
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    Application of green retrofit technology: A systematic review
    (1/01/2020) Weerasinghe A; Ramachandra T; Rotimi JOB
    Green retrofitting is a valuable approach for upgrading existing buildings towards sustainable performances. However, the lack of knowledge about the true cost effects and potential savings of green retrofits distracts building proprietors from paying those retrofits. Therefore, the current study reviewed fourteen studies available in the extant literature and identified twenty-eight different green retrofits incorporated into various buildings with their cost effects and saving potentials through a subsequent desktop study. The results indicated that the majority of green retrofits offer savings related to energy consumption, CO2 emissions, cooling load, and operating costs. Moreover, energy-saving lighting modifications are widely done in most buildings, while solar collectors, photovoltaics, and low-emission double glazing are used less often due to the long payback period and increased cost of implementation. Alternatively, the use of retrofits with lower costs and high savings, like BMS, lighting controllers, and boiler efficiency improvements, offsets the above setbacks. Furthermore, the highlighted retrofits include green roofing, bicycle parks, CO2 sensors, and air tightening retrofits, which also save energy. Rainwater harvesting absorbs carbon dioxide and runoff water, where implementing subsystem-level water meters, appliances with low flow rates, and greywater recycling save and recycle the portable water. Accordingly, the study promotes the effective implementation of green retrofits in future buildings.
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    Benefits, constraints and enablers of modular offsite construction (MOSC) in New Zealand high-rise buildings
    (Emerald, 2023) Shahzad WM; Reddy SM; Kahandawa R; Rotimi JOB
    Purpose: The ascendancy of modular offsite construction (MOSC) over traditional construction methods is well known. Despite the known potential of this construction approach, its adoption is minimal in New Zealand construction industry. This article investigates the potential benefits of using MOSC for delivery of high-rise buildings in New Zealand, underlying factors responsible for its low uptake and the measures that can facilitate its improved uptake. Design/methodology/approach: This study utilised a mixed research approach. An empirical questionnaire survey was carried out with New Zealand construction industry professionals with expertise in MOSC. Factor analysis of survey data was carried out using SPSS software. Semi-structured interviews were carried out with subject matter experts to get further insights and expand the survey findings. Interview data were analysed using thematic analysis. Findings: Study identified benefits of MOSC, thus establishing potential of its uptake for high-rise building construction. Constraining factors were investigated, most pronounced being low level of skills in construction industry to design, manufacture and integrate supply chain of MOSC, high initial investment, high cost of importing modules and negative perception about offsite manufactured buildings. This study also highlighted the enablers to improve uptake of MOSC. These enablers included; loan and mortgage policies to suit MOSC paradigm, building regulations to support OSC industry, increased support from the government and awareness and acceptance of standardised building designs among the clients. Originality/value: Originality of this paper harps from little to no research carried out to investigate use of MOSC for high-rise buildings in New Zealand context.
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    Blockchain and information integration: Applications in New Zealand’s prefabrication supply chain
    (MDPI (Basel, Switzerland), 2021-12-03) Bakhtiarizadeh E; Shahzad WM; Poshdar M; Khalfan M; Rotimi JOB; Banaitis A
    New Zealand’s rising demand for new and affordable homes is driving innovative and effective methods for project delivery. Prefabrication or off-site construction is considered an innovative approach to project delivery that eliminates the limitations of traditional construction methods. However, the prefabrication industry struggles with several challenges, including poor coordination and low supply chain integration amongst its partner organisations. There has been previous literature on improving the prefabrication supply chain integration, but few studies about the role of technology in this sector. Therefore, this article provides intuitions into the applicability and benefits of advanced technologies, namely blockchain, for improving supply chain integration in the context of prefabrication in New Zealand. A questionnaire survey was used to identify the channels used for information exchange between clients and contractors. Moreover, the questionnaire ascertained the positive effects of blockchain on enhancing supply chain integration between the two partners. Blockchain has proven to be a secure information integration instrument that can improve the integration of the prefabrication supply chain by fostering collaboration between organisations.
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    Blockchain technology applicability in New Zealand’s prefabricated construction industry
    (30/03/2022) Bakhtiarizadeh E; Shahzad W; Poshdar M; Rotimi JOB
    Different industries are modernising their systems and introducing innovations to their management practices. However, the construction industry is recognised for its lack of technological systems on which the success of this sector is deemed to be heavily dependent. Previous studies have focused on enhancing the off-site construction supply chain. However, studies on the importance and utilisation of technology in this sub-sector are scarce, predominantly where the efficiency of off-site supply chain management is stalled as a consequence of the slow implementation of technology. Thus, this article employs an exploratory approach by providing insight into the applicability of blockchain technology in New Zealand's off-site construction and demonstrates the benefits associated with the adoption of this technology. A literature review was used to identify stakeholders' interrelationships in different stages of prefabrication projects. Then, a pilot interview from industry experts followed by a questionnaire survey was used to determine the involvement of stakeholders in different phases and the benefits that blockchain technology can bring to this industry. The results indicate that using blockchain as a secure information management system could improve the integration of prefabrication supply systems by producing a collaborative atmosphere amongst the organisations involved.
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    Bridging Sustainability and Performance: Conceptualizing Net-Zero Integration in Construction Supply Chain Evaluations
    (MDPI AG, 2025-06-24) Hettiarachchi I; Rotimi JOB; Shahzad WM; Kahandawa Appuhamillage R
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    Business environment, CRM, and sustainable performance of construction industry in New Zealand: A linear regression model
    (MDPI AG, 2021) Alqudah HE; Poshdar M; Oyewobi L; Rotimi JOB; Tookey J
    Increasing fragmentation of the construction industry makes it riskier and more competitive. Construction management researchers have become intrigued by the factors influencing performance differentials due to such fierce competition. This study examines the relationships between the business environment and customer relationship management and their effect on construction organisations sustainable performance. It develops a model to explain performance differential between construction organisations in New Zealand by using the linear regression technique. A questionnaire was administered to professionals within construction organisations. A total of 101 usable responses were analyzed for descriptive statistics and correlations. Following the balanced scorecard performance metric, the organisations’ sustainable performance was measured using customers, financials, internal processes, and growth and learning metrics. Results indicated that environmental dynamism had a significant regression with internal business processes and perspectives on learning and growth, with 0.259 and 0.607, respectively. CRM was significantly associated with financial (0.327), customer (0.373), and internal business process (0.451) perspectives. This study provides an integrative framework to construction enterprises, and determinants of organisational sustainable performance, which are substantial developments in the current literature on CRM practices. Given the significance of the construction sector to the global economy, ecology, and social well-being, its sustainable performance can lead to a sustainable future for communities.
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    Causes of payment problems in the New Zealand construction industry
    (University of Technology Sydney (UTS) ePress, 2015) Ramachandra T; Rotimi JOB
    Payment delays and losses persist in the construction industry and continue to be a key concern to industry practitioners. Therefore an exploration of the key causes of payment delays and losses is undertaken in this study with the ultimate objective of seeking mitigating solutions. The study adopted a survey approach using an online questionnaire, administered to practitioners from the New Zealand construction industry, comprising consultants, head contractors and subcontractors. The data obtained was analysed using inferential statistical techniques, including comparing means and factor analysis. Factor analysis enabled clustering of the inter-related causes of payment delays and losses in order to find reduced number of causes. Accordingly, the study found that payment problems mainly relate to contractual issues, financial strength of industry players, disputes, short-comings of payment processes and ‘domino effects’. Among them, the financial strength of critical industry players was considered central to payment problems. The study concludes that any solution to these problems must address these primary causes, as a rational starting point. Thus procuring a feasible form of financial security at the outset of a project, and the pre-qualification of the financial status of critical project participants, were found to be significant in the mitigation of construction payment risks
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    Classification of rework root causes in the design stage of projects for contract assessment
    (IOP Publishing Ltd, 2022-01-01) Asadi R; Rotimi JOB; Wilkinson S
    Rework is one of the leading causes of cost and time overruns that primarily affect project performance. The performance of construction projects can be elevated with the implementation of rework moderation strategies. Identifying rework root causes is the first step of rework management followed by a mitigation approach, reducing or preventing strategy. As the contract is the core connection between clients and contractors, using a rework management approach in the contracting process allows participants to be aware of rework impacts before the project's commencement. Selecting the best approach for rework mitigation depends on rework causes and their classified roots. Thus, the paper classifies rework root causes in the design stage of projects to provide a platform for contract documents assessment. The method used to classify the identified rework causes into five categories was designed on the literature. Results from collecting secondary data indicated all categories in the design stage, consisting of technical, human resources, process, material/equipment, and other general factors. The next step of the study is to assess contract documents through a questionnaire based on these classified factors in search of a connection between rework, contractual claims, and clauses of the contract. The paper recommends that assessing contract documents can be used as a new approach for rework management.
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    Combating Greenwashing of Construction Products in New Zealand and Australia: A Critical Analysis of Environmental Product Declarations
    (MDPI AG, 2024-11-06) Moshood TD; Rotimi JOB; Rotimi FE
    The construction industry’s increasing environmental impact has led to the widespread adoption of sustainability claims, yet the prevalence of greenwashing—where organizations make misleading environmental claims—threatens genuine sustainable development efforts. Environmental Product Declarations (EPDs) have emerged as a potential solution, particularly in the New Zealand and Australia construction sectors, where recent government climate regulations have accelerated their adoption. However, the effectiveness of EPDs in combating greenwashing and their practical implementation remain understudied. This research addresses this gap through a comprehensive analysis of EPDs in construction, employing a systematic literature review of 82 articles from 2010 to 2024 across major databases. Using ATLAS.ti 9 software, this study makes three key contributions: (1) develops a novel framework for evaluating EPD programs and their effectiveness in preventing greenwashing, (2) establishes a standardized methodology for assessing the completeness and accuracy of life cycle assessment information in EPDs, and (3) provides evidence-based recommendations for improving EPD implementation in the construction industry. The findings reveal critical shortcomings in current EPD practices, including inconsistent assessment methodologies and incomplete life cycle data. This study proposes specific reforms to enhance EPD reliability and transparency, offering practical guidelines for industry stakeholders to verify environmental claims. These contributions advance both the theoretical understanding of environmental certification systems and practical implementation of sustainable construction practices by developing regulatory frameworks.
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    Comparative Life-Cycle Cost (LCC) study of Green and Traditional Industrial Buildings in Sri Lanka
    (Elsevier, 2021) Weerasinghe AS; Ramachandra T; Rotimi JOB