Browsing by Author "Amuda-Yusuf, Ganiyu"
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Item APPRAISAL OF APPLICATION OF VALUE ENGINEERING METHODOLOGY IN MECHANICAL AND ELECTRICAL SERVICES INSTALLATIONS(Penerbit UTM Press, 2015) Amuda-Yusuf, Ganiyu; Sanni, Afeez; Olowa, TheophilusValue engineering (VE) is a structured team-oriented problem solving approach that can be applied throughout the lifecycle of a building project. However, the methodology is rarely applied in mechanical and electrical services (M&E) installations in buildings because clients are not aware of the potential benefits of adopting VE and different members of design team lack the requisite knowledge about VE methodology. As a result, a great deal of unnecessary cost is created due to the increasingly complex nature of M&E services in buildings leading to cost overruns and unhappy clients. The purpose of this study is to investigate the level of adoption of VE methodology in the design and installations of M&E services in buildings in Malaysian construction industry. The research method adopted is questionnaire survey to industry practitioners and inferential statistics was adopted for data analysis. Findings from the study show that, VE is not well appreciated in the industry and there is no structured approach adopted for its adoption for the procurement of mechanical and electrical services. Practitioners are of the opinion that implementation of VE could lead to: significant capital and life cycle cost savings in buildings generally; alignment of stakeholders and construction process improvement; improved client satisfaction, and shared understanding among key participants. An implementation framework was developed which emphasised on the need for early involvement of consultants and collaboration between the downstream supply chain for effective implementation of VE methodology on mechanical and electrical services.Item Assessment of Health and Safety Information on Construction Sites in Nigeria(2019-05) Adebiyi, Ranti, Taibat; Olubola, Babalola; Amuda-Yusuf, Ganiyu; Rasheed, Abdulkadir ShehuThis study identified and assessed health and safety information used on construction sites in Lagos State, Nigeria, with a view to enhancing effective communication among the site-operatives. Data for the study were collected from the site-supervisors and operatives working on construction sites in the study area. The sites of construction firms registered with Lagos State Public Procurement Agency under categories D and E were visited. Pilot survey revealed that there were 55 active construction firms that had on-going projects. The study therefore, adopted purposive sampling technique to identify these 55 active firms. On each site visited, a supervisor and 3 site-operatives were randomly selected from bricklayers, carpenters, iron benders, electricians, and plumbers working on the identified sites, depending on the stage of the work. This resulted into sample of 220. This consists of 55 supervisors and 165 site-operatives. The use of questionnaire was adopted for data collection. The total number of copies of questionnaire retrieved was 161 representing 73.1% response rate consisting of 22% from the supervisors and 78% from the site operatives. Information on health and safety used on construction sites were collected. Mean score (MS), standard deviation (SD) and analysis of variance technique were the analytical tools used. The results revealed that the most used health and safety information were first aid procedures with MS of 3.92, safety sign and symbols (MS 3.89), use of protective equipment (MS = 3.75) and procedures for safe operation (MS = 3.69). There is no significant difference between the ranking of these information from both supervisors and operatives. This implied that the respondents concurred in their independent opinion regarding the usage of health and safety information. The study concluded that safety of construction site-operatives depended on health and safety information made available by the contracting firms.Item AN ASSESSMENT OF THE EFFECTIVENESS OF HEALTH AND SAFETY COMMUNICATION STRATEGIES IN THE CONSTRUCTION INDUSTRY(The Department of Architecture, Ahmadu Bello University Zaria-Nigera, 2017) Ranti, Taibat ADEBIYI; Olubola, Babalola; Amuda-Yusuf, GaniyuAccidents and injuries are growing problems on construction sites in Nigeria as well as in many other countries. The occurrence of accidents on construction sites usually leads to site closure for accident investigation, loss of man/machine hours, loss of output, loss of corporate reputation, payment of burial expenses/compensation/insurance claims for the dead. Previous studies suggested poor communication of Health and Safety (H&S) information among site personnel as one of the major causes of accidents on construction sites. These previous studies have made little headway in identifying the best strategy for effective communication of health and safety information between contractors and on-site personnel. Therefore this study will identify and assess the communication strategy used on construction sites in Lagos State. Lagos State was chosen as the study area because 60 - 65 of head offices of contracting organizations were located in this area. In addition, the study area is very active in terms of project/construction activities. A total of one hundred and forty-five (145) questionnaires were administered on contractors and site workers through convenience and snowballing sampling. A total of sixtyĀ¬eight (68) properly completed questionnaires were analyzed resulting in an effective response rate of 47. The mean score of each item was adopted to rank them in order of importance. The results of the study revealed that only nine (9) out of sixteen (16) communication strategies identified are actually important. The most significant five (5) strategies in order of importance are: training workshop,' project briefing,' safety induction,' operating procedures and posters. It is recommended that the significant strategies identified from this study can be used to communicate H&S information on construction sites thereby reducing accidents on sites.Item Barrier Factors Affecting Adoption of Green Building Technologies in Nigeria(Built Environment Journal, 2020-08-21) Amuda-Yusuf, Ganiyu; Raheem, Wasiu Mayowa; Adebiyi, Ranti Taibat; Abdulraheem, Maimunat Orire; Idris, Soliu; Eluwa, Stephen EyinayaGreenhouse gas emission from activities in the built environment is increasing exponentially due to increase in building operations. This study aims at determining factors that affect adoption of Green Building Technologies that normally reduce greenhouse gas emissions. To elicit relevant information, online structured questionnaire forms were administered on practitioners who have been involved in green building development in Nigeria. Mean score ranking was adopted in ranking the barriers to green building technologies, while discriminant analysis was performed to examine how organizations groups (client, consulting, contracting, academia) were distinguished on the barrier factors identified. Findings revealed that, out of the 23 barrier factors considered in this research, lack of institutions to formulate policies and set guidelines (mean score - 4.5) ranked 1st as barrier to adoption of green building technologies in Nigeria. This is closely followed by lack of information about green products (4.0), low level of awareness about sustainability issues (4.0), human resource and client knowledge, lack of knowledge about green building technologies, high cost of green products, while unavailability of sustainable materials and products ranked the lowest (2.7). Only nine factors at 0.05 level of significance entered the discriminant analysis model and emerged as variables with the most significant power in differentiating the organization groupings on the basis of perceived barriers to adoption of green building technologies. The study recommends that there should be strong political will from government, to establish institutions that formulate policies on green building technologies.Item 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 ānot at all a barrierā to 5 āextreme 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.Item Barriers to Electronic Tendering Adoption by Organisations in Nigerian Construction Industry(Environmental Technology and Science Journal, School of Environmental Technology, Federal University of Technology, Minna, Nigeria, 2019-12) Amuda-Yusuf, Ganiyu; Gbadamosi, S.; Adebiyi, Ranti, Taibat; Rasheed, Abdulkadir Shehu; Idris, Soliu; Eluwa, S. E.Tendering is an important aspect of procurement that requires the use of information technology to enhance project performance. This study has identified the barriers to etendering adoption leaning upon Technology, Organisational, and Environment (TOE) framework and innovation diffusion theory. Googleforms was used to administer questionnaire to practitioners in construction organisations in North Central Nigeria. Confirmatory factor analysis through structural equation model was used to analyze the data. The study found that there is a positive relationship between external barrier and e-tendering adopting (Ī² = .12, p<0.05) on one hand and internal barrier on the other hand (Ī² = .18, p<0.05). External barriers factors are availability of hardware and software, government policy, poor ICT infrastructure to support e-tendering and competitive pressure from rival organisations in the industry. While internal factors include the size of firm, legal protection of online transactions security (hacking and tracking of user data) and lack of agreed standard have significant impact on the organisation's intention to use e-tendering. Also, IT skill of organisation's labour force has a positive effect on e-tendering adoption (Ī² = .41, p<0.05). These findings will enable policy makers and other industry players to understand the barriers to the implementation of e-tendering adoption and develop strategies to overcome them.Item Critical Risk Factors Affecting Infrastructure Projects in Kwara State, Nigeria(USEP: Journal of Research Information in Civil Engineering, 2022-03-15) Idris, Soliu; Amuda-Yusuf, Ganiyu; Olorunoje, Lukman Olanrewaju; Adebiyi, Rant TaibatInfrastructure projects are becoming larger in nature, more complex in a dynamic project environment which are vulnerable to various technical, socio-political, business uncertainty and project related risk. As a result, most of these projects are being over running in terms of either cost, time or expected quality. These projects therefore, require complex risk analysis, risk allocation and risk mitigation, given the highly complex nature and enormous amounts of resources required. The aim of this study therefore, is to identify the critical risk factors affecting the infrastructure projects delivery. Forty-eight risk factors were identified through extant literature review. This was followed by administration of questionnaire to construction practitioners involved in infrastructure projects in Kwara State, Nigeria. Three-stage approach was adopted in the data analysis. The first was determination of risk scores, followed by determination of relative significance of each risk factor using relative importance index (RII) and the final stage involved ranking of the risk factors based on their RII values. Based on this analysis, the study uncovered ten (10) critical risk factors namely, financial difficulties, incomplete design, time allotted to design, inadequate program planning and contractors experience. Others include delay in progress payment, inadequacy of site inspections, design team experience, unstable inflationary and foreign exchange rate. Correlation analysis was also conducted between the top 10 critical risk factors and the result reveled that there is a significant relationship between the identified risk factors. The study suggests that risk analysis should be conducted at the early stage of the project to identify and evaluate project related risks and appropriate mitigating measure should be put in place immediately. Findings from this study will be helpful to project stakeholders to understand the highly risky factors in infrastructure project and where applicable, assign responsibility for those who are best suited to control themItem Drivers and barriers of using web-based asynchronous communication tools for monitoring construction projects(Journal of Engineering, Project and Production Management, Published by Sciendo, De Gruyter, Poland., 2023-01-01) Rasheed, Abdulkadir Shehu; Adebiyi, Ranti Taibat; Amuda-Yusuf, Ganiyu; Suleiman, SuleimanConstruction project monitoring (CPM) is becoming more expensive and error-prone for clients with multilocation projects and consultants. The persistent problem of late decisions that occur on-site, mostly reported after significant time has elapsed further reduces monitoring efficiency. This study examines drivers and barriers to the use of Web-based asynchronous communication tools (WACT) for CPM in the Construction Industry. Copies of structured questionnaires were administered to 485 construction professionals on active construction sites comprising construction managers, architects, quantity surveyors, and engineers in Lagos and Abuja who are involved in CPM and 256 (53%) were returned. Exploratory factor analysis (EFA) extracted 5 drivers and 4 barriers to the use of WACT for CPM. Factors were ranked using mean and standard deviation. The degree of agreement between the two domains was compared using the Kendall coefficient of agreement. Results show that project monitoring efficiency (PME) factors ranked highest amongst drivers for use of WACT for CPM. Other drivers, that equally ranked high, are project monitoring cost (PMC) and project monitoring time (PMT) factors. Construction industry culture (CIC) factors ranked highest as a barrier with organisational personnel (OP) and technology adoption (TA) factors equally of significant rank. The Study identified latent drivers and barriers to the use of WACT for CPM. Results also revealed construction professionals are willing to use WACT for CPM but are skeptical about its seamless use to take over the traditional monitoring methods. It is recommended that client agencies that fund multi-location projects like the United State Agency for International Development (USAID) or Tertiary Education Trust Fund (TETFund) in Nigeria should develop models for the use of WACT for CPM. Similarly, consulting firms can reduce overhead on travel expenses and improve monitoring efficiency by hosting such tools on their projects.Item Effects of environmental factors on construction projects time and cost performance(Journal of Environmental Spectrum, Published by Faculty of Environmental Sciences, University of Ilorin, Nigeria, 2015) Adebiyi, Ranti Taibat; Babalola, Olubola; Amuda-Yusuf, GaniyuThe delivery time and cost of a construction project is a key factor and source of concern to project stakeholders in the Nigerian construction industry. It is apparent that environmental factors are a major contributor to construction time and cost overruns. This study examines the influence of environmental factors on construction time and cost performance in Lagos state. A total of two hundred and forty-one (241) copies of questionnaire were administered on industry practitioners through convenience and snowballing sampling. A total of twenty-six (26) environmental factors were identified and grouped under six categories. The magnitude of the mean scores of each item was adopted to rank them in order of importance. The results of the study revealed that cost of government policy is the most significant factors affecting time overrun with a mean score of 4.7552 followed by project team commitment with a mean score of 4.4772. Similarly, instability in government and importation of materials and equipment are considered as the most significant factors affecting cost overruns. However, the significant factors identified from this study can be used as parameters for developing strategy for reducing the impact of environmental factors on on construction time and costItem 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, LukmanMechanical 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.Item Level of Application of Technologies for Health and Safety Management on Construction Sites in Lagos state, Nigeria(College of Environmental Sciences, Joseph Ayo Babalola University, Ikeji Arakeji, Osun State, Nigeria., 2023-06-01) Adebiyi, Ranti Taibat; Charles, Isioma Pricillia; Amuda-Yusuf, Ganiyu; Rasheed, Abdulkadir Shehu; Olorunoje, Lukman Olarewaju; Idris, SoliuSafety of workers is a grave concern to all stakeholders on construction sites, as construction operations are mostly carried out in hazardous environments due to complexity of construction projects. Research findings revealed the effectiveness of use of technologies in Health and Safety (H&S) management. However, the rates of accidents are still high on construction sites. The objective of this study therefore is to determine the level of application and barriers to the application of technologies for H&S management in Lagos, Nigeria with a view to enhancing safety practices. A questionnaire was designed to collect information on level of application and barriers to the application of technologies for H&S management. Copies of questionnaire were administered to active construction firms in Lagos. Pilot survey revealed 135 active firms at the time of carrying out the study. Purposive sampling method was used to distribute the questionnaire. Findings revealed that application of technologies in H&S management in construction is relatively low. Online Database and Internet of Things were the most used technologies while Robotics and Automaton were rarely used. Capital intensive and low technical ability were the major barriers affecting the application of technologies in construction. From the findings, contracting firms need to increase allocation of capital for acquisition of new technologies and train their workers on the use of these technologies to enhance their safetyItem 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, TheophilusMechanical 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.Item 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, SoliuManual 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.Item RISK FACTORS AFFECTING COST AND TIME PERFORMANCE OF CIVIL ENGINEERING PROJECTS IN KWARA STATE(Faculty of Environmental Sciences, University of Ilorin, 2019) Idris, Soliu; Awodele, O. A.; Amuda-Yusuf, GaniyuThe construction industry is known for being very poor compared to other industries in the identification, assessment and management of project related risks. Civil engineering projects in particular are more risky due to the nature, complexity and enormous amount of resources required conversely leading to cost and time overrun. This paper aimed at evaluating the potential risk factors associated with civil engineering projects with the view to achieving overall project objectives. A-31 risk factors were identified from the literature review and were used as basis for a questionnaire survey administered to the Architects, Quantity Surveyors and Engineers in Kwara State. Eighty (80) questionnaires were administered; fifty one (51) were retrieved and analysed using mean item score for the identified factors. Research findings showed that incomplete design, unstable inflationary trend, delay in progress payment, financial difficulties, improper project planning, inadequate programme planning and foreign exchange rate had greatest impact on civil engineering projects. Whereas factors such as Force majeure, labour dispute and strike and mistakes and discrepancies in contract documents has least impact. The study recommends that project team should identify and quantify project related risk at the initial stage and allocate the risks to party suitable to control them.Item 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, SoliuMechanical 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.Item 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 nationās 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.