Browsing by Author "Adebiyi, Ranti T."

Now showing 1 - 6 of 6
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    Barriers to Building Information Modelling Adoption in Nigeria.
    (Department of Civil Engineering, University of Ilorin, Ilorin, Nigeria., 2017) Amuda-Yusuf, Ganiyu; Adebiyi, Ranti T.; Olowa, Theophilus; Oladapo, Babatunde I.
    Building Information Modeling (BIM) adoption is still evolving in Nigeria and there are no many examples of its usage for project execution by industry practitioners. There is a dearth of studies on how barriers to BIM adoption can be overcome. Following the identification of barriers to BIM adoption from literature, an online survey approach was used to investigate the perception of Nigerian construction industry professionals on the significant barriers to BIM adoption based on a five point Likert scale from 1 ā€œnot at all a barrierā€ to 5 ā€œextreme barriersā€. Class means difference among professional group was used to identify barriers to BIM adoption and a discriminant analysis was used to established disagreement among the respondents. The result shows that, the various groups have equal mean discriminant function score on 16 barrier factors to BIM adoption, indicating agreement in the opinion of the groups on these factors. However, 5 items have the most significant predictive power in differentiating the professional groups from the standpoint of perceived barriers to BIM adoption. Implying that there is difference of opinion between the group on whether the 5 factors constitute barriers to BIM adoption or not. The factors in order of magnitude are: clients low level of awareness, lack of funding, poor power supply, legal uncertainty and lack of transparency. The barrier factors identified in this study will assist industry stakeholders in formulating appropriate strategies to overcome them in order to ensure successful BIM implementation. Findings from this study indicates the need for construction industry stakeholders to encourage practitioners to adopt BIM at various level for project execution.
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    Evaluation of Risk Factors Impacting Cost and Time Performance of Mechanical and Electrical Services Installations in North Central Nigeria.
    (Faculty of Environmental Design and Management, Obafemi Awolowo University, Ile-Ife., 2018) Amuda-Yusuf, Ganiyu; Adebiyi, Ranti T.; Olowa, Theophilus; Oladapo, Babatunde I.; Olorunoje, Lukman
    Mechanical and Electrical (M:&E) services project are complex in nature and a number of risk arises at the design and installation stages resulting into poor cost and time performance. This paper identified and ranked the risk factors affecting cost and time performance of M&E services projects. Thirty risk factors identified from preliminary investigations were adopted as basis for a questionnaire survey to architects, engineers, quantity surveyors and project managers in North Central Nigeria. Initial statistical analysis produced 23 risks factors that would affect cost and time performance of M&E services projects and analysis of variance results show that no significant difference exists among the opinions of the professionals surveyed on the 7 risk factors. Factor analysis was adopted to classify the risk factors into five principal components namely, pre-contract risks, post contract risks, clients' related risks, procurement and external risks.The risk identification and ranking are good tools for assessment of risks related to M&E services projects. In addition, the classification of the risk factors can be used to establish important risk factors that require the attention of project participants. This will allow the client and contractor to understand the high-risk areas in M&E services projects and assign responsibility for those risks to the party or parties best situated to control them.
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    Perspectives on cost management roles of Quantity Surveyors in Mechanical and Electrical services projects.
    (College of Engineering and Environmental Studies, Olabisi Onabanjo University, Ogun State, Nigeria., 2016) Amuda-Yusuf, Ganiyu; Adebiyi, Ranti T.; Olowa, Theophilus
    Mechanical and Electrical Services (M&}:j is a complex system of buildings and their values constitute a significant component of construction costs. The procurement is commonly based on Iump sum and performance specification and there is lack of reliable cost information regarding elements of M&E services to guide project participants at the inception of building projects leading to inaccurate budget estimate, disputes, time and cost overruns. This study examined the cost management roles and functions performed by Quantity Surveyors (QS) on M&E services projects. The study was carried out using data from questionnaire survey to QS and services engineers in the North-Central geopolitical zone of Nigeria. Data analysis was carried out using t-test of the means to check the significance of the responses to the issues raised in the questionnaire. The results showed that the pre-contract cost management roles performed by QS is limited to the use of single purpose approximate estimating method, statistical method and historical cost information to advice clients' on M&E services project at this stage. At post-contract stage, QS prepare interim valuation, assessment of variations, claims and final account preparation. Quantity Surveyors missed the gap to effectively manage the cost of M&E services project, instead, single price approximate estimating methods based on historical cost information and statistical approach to establish indicative cost of M&E. services project. Making it difficult for QS to offer reliable cost advice for comparative design solutions of alternative M&E components and installation. With the increase in the value and complexity of Mechanical & Electrical Services projects, industry clients should engage quantity surveyors to perform the full spectrum of their cost management functions on element of M&E services project. Quantity surveyors should also collaborate effectively with services engineers from the inception of M&E services project to enable them gain full understanding of the technology of M&E services components.
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    Quantity Surveying Practice and Evolution of 5D Building Information Modelling.
    (College of Engineering and Environmental Studies, Olabisi Onabanjo University, Ogun State, Nigeria., 2015) Amuda-Yusuf, Ganiyu; Adebiyi, Ranti T.; Olowa, Theophilus; Idris, Soliu
    Manual quantification by Quantity Surveyors (QS) from two dimensional drawings is complex and prone to human error because of technological and organizational problems. Building Information Modelling (BIM) is an emerging technology with potentials for automation of quantity take-off and estimating process. This study examines barriers to five dimensional (5D) BIM adoption, by Nigerian QS. Purposive sampling approach was used to administer questionnaire to practitioners in construction, consulting and clients' organizations. in Nigeria. A total of 53 validly completed questionnaires were returned and analyzed using Statistical Package for' Social Sciences . The five most important barrier factors to 5D BIM adoption by QS are: lack of collaborative initiatives from industry stakeholders; problems of communication and data sharing among firms; lack of government support and clear road map for BIM implementation; BlM model is not compatible with traditional take-off/estimating software tools; and non-alignment of current rules of Building and Engineering Standard Method of Measurement. The 5-dimensional BIM have tremendous potentials to increase the communication efficiency and interpretation ability of quantity surveyors. However, there is need for construction industry stakeholders to formulate strategies to develop and implement information exchange system that can support collaboration.
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    Risk Factors Impacting Cost and Time Performance of Mechanical and Electrical Services Projects
    (Faculty of Environmental Design and Management, Obafemi Awolowo University, Ile-Ife., 2017) Amuda-Yusuf, Ganiyu; Adebiyi, Ranti T.; Olowa, Theophilus; Olorunoje, Lukman; Idris, Soliu
    Mechanical and electrical (M&E) services project is complex in nature and involves a large number of specialist organisations entering the project life cycle at different stages with different lines of relationships, responsibilities and riskmanagement capabilities. Hence, a number of risk arises at the design and installation stages which results into poor cost and time performance in M&E services projects. This paper identified and rank the risk factors affecting cost and time performance of M&E services project. A total of 30 risk factors identified from preliminary investigations was adopted as basis for a questionnaire survey to industry practitioners in Nigeria. Mean response analysis was used to determinedthe probability and severity of the risk factors and risk impact scores was used to rank the relative importance of the risk factors. Analysis of variance (ANOVA) was used to investigate differences of opinions between respondents'. The study identified 23 risk factors (risk impact >3.5) impacting M&E service projects. Out of these risk factors, 7 has significant impact while the rest havemoderate impact. The 7 risk factors in order of their significance are: high foreign materials content, poorly prepared tender documemt, late involvment of M&E engineers,noninvolvement of specialist designers, government policy change, poor specification and poor coodination of design imputs. In addition,ANOVAresults showthat no significant difference exists amongthe professionals on these 7 risk factors.This suggests that the risk level of M&E services project is high.The identification and ranking of the risk factors has practical implication inM&Eservices project. The risk identification and ranking table is a good tool for assessment of risks related toM&Eservices at project inception. This will allow the client and contractor to understand the high risk areas in M&E services project and, where applicable, assign responsibility for those risks to theparty orparties best situated to control them.
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    Strategies Adopted by Nigerian Construction Firms in a Recessive Economy.
    (The Nigerian Institute of Quantity Surveyors., 2017) Olowa, Theophilus; Amuda-Yusuf, Ganiyu; Adebiyi, Ranti T.
    Nigerian economy is currently in recession with extreme financial pressures on all sectors of the nationā€˜s economy. The construction industry is particularly affected with significant reduction in the number of construction projects available for various categories of construction organisations in the country. As a result, a number of construction organisations are downsizing, lack capacity to tender for new jobs, folding-up due to lack of strategies to adapt to economic downturn. The purpose of this paper is to examine the survival strategies of Nigerian contractors in the period of economic recession in the construction industry with a view to formulating strategies for survival in response to economic downturn. Structured questionnaires were administered to personnel in the construction organisations using snowball sampling technique and a total of 35 questionnaires returned were analysed using simple frequency, percentages and mean score with the aid of SPSS 20.0 and Excel 2010 packages. The result shows that most contractors opt for reduced tender pricing, stringent cost control measures, stricter site management procedures, effective relationship management with clients and diversification of business interest. In order to survive the period of economic down turn, contractors should exhibit prompt response to changes caused by external factors so as to remain in construction business. The findings provide guidelines for industry contractors on essential options to consider in the period of dwindling economic activities in the construction industry.