Master of Science (M.Sc.) Theses and Dissertations
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- ItemOpen AccessTenants' choice of residential properties in Ibadan municipality, Nigeria.(Department of Estate Management, Faculty of Environmental Design and Management, Obafemi Awolowo University., 2023) Oshikoya, Taiwo Peter.The study examined the socio-economic characteristics of the tenants in Ibadan metropolis, the characteristics of residential properties, identified the tenants’ choice of residential properties and determined the factors influencing tenants’ choices of residential properties in Ibadan municipality. These were with the view to providing relevant information that enhances the investment decisions of real estate investors. Primary data were collected for the study. Question was used to elicit data from household head of the low residential neighborhood (Idi-ishin, Alalubosa) and medium density (Oluyole, Bodija) in Ibadan municipality. These represent a total number of 6,528 housing units and multistage sampling was adopted in selecting 5% of the residential buildings. A total of 326 residential buildings were selected from which a household head was selected each for questionnaire administration. The data collected entails the socio-economic characteristics, characteristics, of the residential property and factors influencing their choice of residential property. The study adopts techniques such as frequency distribution and percentages, cross tabulation, chi sqaure and factor analysis. The result shows that the respondents comprise of active population within the age bracket 30-50 with 50.3% were largely female and income level is between #150,000 to #251,000. Further findings reveal that most of the residential properties in low residential densities had well finished 3-bedroom flat and semidetached apartment, while medium density are mostly 2-bedroom flat and 3-bedroom respectively. The study discovered three principal factors (security, tenants’ occupation and distance to place of choice) that influence tenants’ choice of residential property across the two residential densities which are neighborhoods security, facilities and services with a percentage variance of 23.19%. This is followed by socio-economic characteristics of the respondents with a percentage variance of 13.92 and lastly, distance and proximity to places of choice with a percentage variance of 12.50%. The study concludes that investor should take into consideration the three principal factors in their decision to invest in residential property in the study area.
- ItemOpen AccessA Study of Green Building Rating Systems in Lagos state, Nigeria(Department of Building, Faculty of Enviromental Design and Management, Obafemi Awolowo University, Ile-Ife, Nigeria., 2023) OLAOYE, Folawiyo TimilehinThe study examined the Green Building Rating System (GBRS) in use for building projects in Lagos State, Nigeria and their strengths and weaknesses; assessed the importance of the criteria for adapting the Green Building Rating Systems in use; and developed a weighting framework of the criteria for improving the Green Building Rating Systems. These were with a view to enhancing the applicability of the rating systems. The data for the study were collected from primary and secondary sources. Primary data on the rating systems in use, their strengths and weaknesses, their criteria of assessment, and the required criteria for enhancing their applicability to the Nigerian local context were collected during one-on-one interviews conducted on green building experts that were identified from twelve (12) certified green building projects in the study area. A total of eighteen (18) green building experts were invited for interview, and thirteen (13) of them took part in the interview, indicating a 72.2% effective response rate. Secondary data including the criteria checklist of the certification systems which were sourced from their official websites and hand-books, were used to refine and substantiate the primary data. The data obtained were analysed using Thematic analysis, Priority ranking and Fraction Method. The results showed that the most prevalent GBRS in use in the study area were EDGE and LEED. The results further showed the categories used for assessing and certifying buildings in each certification system; the certification process in each certification system; and the building projects that they had certified in the study area. Findings on the strengths and the limitations of the LEED and EDGE certification systems with respect to the local conditions of the study area, showed the major strength of the LEED and EDGE to be used to assess and certify various building types including residential buildings, commercial spaces, and industrial buildings. Both 15 the LEED and EDGE performed well in all the phases of the building project (design, construction, operation and end of life). The only significant limitation in the adoption of the EDGE and LEED was their lack of functionality in the social aspects of sustainability in buildings. The result further revealed the important criteria for adapting the EDGE and LEED to the local context of the study area to include energy efficiency, water efficiency, waste management, pollution and emission and climate and resilience to environmental hazards. The study developed a weighting framework and flowchart representation of the criteria to be considered by the green building experts to enhance the applicability of the rating systems. The study concluded that the EDGE and LEED were sufficient for assessing the environmental aspect of sustainable buildings, but less functional with respect to safety and security, socio-cultural aspects, and Life-cycle cost efficiency.
- ItemOpen AccessPerformance evaluation of lighting retrofitting in lecture halls of Obafemi Awolowo University, Ile-Ife, Nigeria.(Department of building, Faculty of environmental design and management, Obafemi Awolowo University., 2021) ADELEKE Jacob SolaThis study examined the lighting energy consumption pattern of the existing fluorescent lamps; assessed the impact of retrofitting using compact fluorescent lamps (CFLs) and light emitting diode (LED) lamps on the consumption pattern; determined the payback period on investment made when retrofitting lighting with the two energy efficient lamps. These were with a view to providing information on the potential benefit of retrofitting lighting systems with energy efficient lamps in selected lecture halls in Obafemi Awolowo University, IleIfe. Data for this research work were obtained using quantitative approach by carrying out simulation on three selected lecture halls which was based on purposive sampling techniques. An energy monitor was used for the measurement of energy consumption at periodic logins of 1hr, 3hrs, 6hrs, 12hrs, 1day, 7days, 1 month and 3 months. Data collected were presented and analysed using frequency distributions, Mann-Whitney and Bartlett’s test, Pearsons’ correlation, simple percentages and standard payback equations The results showed that the energy consumption values of existing fluorescent lamp across the simulated Agriculture Lecture Theatre, Oduduwa Lecture Theatre and Science Lecture Theatre increased consistently based on the numbers of lighting points. The values increased from 0.3211 to 681.576 (ATL), 0.7600 to 1619.4600 (ODLT) and 2.6262 to 5652.4321 (SLT) in 1 hour to 3 months, respectively. The comparative analysis of the energy consumption of the three lamps showed that retrofitting fluorescent lamp with compact fluorescent lamp and light emitting diode lamp reduced energy consumption from 229.096 to 129.101 and 96.396 in 1 month; from 681.576 to 387.302 and 274.188 in 3 months (ATL); from 531.130 to 216.243 and 142.536 in 1 month; from 1619.466 to 692.479 and 426.608 in 3 months (ODLT); from 1840.846 to 657.243 and 500.167 in 1 month; from 5652.432 to 1936.600 and 1499.015 (SLT) in 3 months respectively. The findings also revealed that a wide margin exists between the energy consumption of existing fluorescent lamp with that of compact fluorescent lamp and light emitting diode lamp but a very small margin exists between compact fluorescent lamp and light emitting diode lamp. The percentage energy savings across the three lecture halls also showed that there were significant differences between the electricity consumption before and after simulation of the as-built lamps with 43, 47 and 65% reduction in electricity consumption using compact fluorescent lamp and 57, 73 and 73% using light emitting diode lamp. The Pearsons’ correlation values across the three selected lecture halls were also found to be 1.000, which indicates a very strong positive correlation. The 2-tailed significant value of p < 0.05, which implies that the correlation is highly significant. The results of the retrofits payback period also showed that the compact fluorescent lamp performed better in the return of retrofits investments having a payback period of 7 months, 4 months and 5 months than that of the light emitting diode lamp having a higher payback period of 10 months, 6 months, and 8 months respectively across the three lecture halls. The study concluded that replacing fluorescent lamp with compact fluorescent lamp and light emitting diode lamp would be a feasible option in order to enhance optimal performance of the lecture halls, but in terms of viability, it would be beneficial to retrofit fluorescent lamp with compact fluorescent lamp.
- ItemOpen AccessA study of Mentoring in Real Estate Practice in Northwestern Nigeria(Department of Estate Managment, Falculty of Environment Design and Management, Obafemi Awolowo University Ile-Ife Nigeria, 2023) ISHAYA, David AyockThis study examined the profiles of estate surveying and valuation (ESV) firms in Northwestern Nigeria as well as the skills and competencies lacking of employees in ESV firms in the study area; assessed the mentoring strategies employed by ESV firms in the study area; analysed the effectiveness of the mentoring strategies; and determined the factors influencing the effectiveness of the mentoring strategies employed by the ESV firms in the study area. These were with a view to providing information that could enhance real estate practice. Primary data was employed for the study. The data was obtained from ESV firms practicing in Kano and Kaduna states using a mixed research method involving the use of questionnaires and interviews. A total enumeration survey was carried out on all the 40 and 80 ESV firms in Kano and Kaduna states respectively. Interviews were conducted with three senior surveyors in Kano and seven in Kaduna states. Data collected from the ESV firms included their profiles, mentoring strategies, employee skills and competencies and factors influencing mentoring effectiveness. The information obtained were analysed using frequency and percentage, mean rating, standard deviation, Analysis of Variance (ANOVA), independent t-test, and Principal Component Analysis. The findings showed that the employees were mostly HND holders (47.01%), while 98% of the respondents were male. More so, majority of the respondents held senior managerial positions with 21% and 84% being Head of Departments Kaduna and Kano states respectively. The results further showed that based on a 5-point Likert scale, risk-taking propensity (MS = 3.64) is the most ranked skills and competencies lacking among employees in ESV firms. Traditional mentoring with response frequency of 88.6% and 92.0 % in Kaduna and Kano states respectively was found as the predominant form of mentoring adopted by ESV firms in the study area. The mentoring strategies adopted by ESV firms xi, xii differed. In Kaduna State, the most commonly employed strategies were encouragement, feedback and participation with mean scores of 2.96, 1.64 and 3.25 respectively; whereas in Kano State, the most used mentoring strategy was conversation (MS = 4.78). With mean scores of 4.74, 4.70, 4.48, 4.30, and 4.17, building trust, emotional support, orientation, experience sharing, and encouragement respectively were the most effective forms of mentoring strategies employed by ESV firms in the study area. Using principal component analysis, the major determinants of the effectiveness of mentoring by the ESV firms are cultural beliefs, individual traits, and the gender of both mentors and mentees with mean scores of 3.26, 3.69 and 2.78 respectively. The study concluded that mentoring in real estate practice in the study areas is not formalized and that its effectiveness is greatly influenced by cultural beliefs, individual traits, and gender factors.
- ItemOpen AccessBUILDING INFORMATION MODELING USAGE AND PROJECT STAGES INTERFACE AMONG CONSTRUCTION PROFESSIONALS IN LAGOS STATE, NIGERIA(DEPARTMENT OF BUILDING, FACULTY OF ENVIRONMENTAL DESIGN AND MANAGEMENT, OBAFEMI AWOLOWO UNIVERSITY, 2022) ADEBOWALE OLUWAYINKA ADEFEMIThis study examined the extent of building information modelling (BIM) usage among construction professionals, determined the interface problems in construction project stages among professionals and investigated the impact of BIM usage on professional’s interface at stages of construction projects in Lagos State, Nigeria. These were with a view to providing information that could enhance project delivery. Primary data were used for this study and obtained through structured questionnaire. The target population was construction professionals who had substantial knowledge of BIM usage and who had experienced interface problems at the design and construction stages of projects in Lagos State. A total of two hundred and sixty (260) copies of completed questionnaire were retrieved through online and physical administration using snowball sampling technique for selection of respondents. Data were analysed using frequency, percentages, exploratory factor analysis, confirmatory factor analysis and structural equation modelling. Findings revealed that more than 70% of the respondents had less than six years’ experience with BIM usage, 36.5% of the respondents had employed BIM for private projects, 48.5% for public-private projects and majority of the construction professionals use BIM mostly for building projects (90%) and design-build procurement method (57.2%). Over 60% of construction professionals had either very low, low or fair level of competency in respect of BIM usage. On the proficiency level of BIM usage, about 86.5% among the professional members were either skilled or semi-skilled. The overall satisfaction level in using BIM for project work was 74.2% among the project members which shows that a majority of them were satisfied with BIM usage. The major interface problems at the design stage in the study are badly written contract (C15); excessive amendments when changes occur in designs (C16) (DIP5=0.794); lack of stipulated data (C4) (DIP1=0.744); and design complexity (C9) (DIP4=0.743). However, the major interface problems at the construction stage are change order (C29) (CIP4=0.814); inadequate specialised quality-control team (C31) (CIP1=0.798); and poor quality of construction (C21) (CIP2=0.797). The impact of BIM on professionals’ interface at the design stage are producing tools for reporting task completion, quality value and mistakes of the design team (ID5) (IDS1=0.836); automatic low-level of amendments whenever modification occurs in design (ID14) (IDS2=0.794); and improve design quality (ID8) (IDS3=0.771). The impact at the construction stage includes enhanced site utilisation, space coordination and production data (IC4) (ICS3=0.788); enhanced quality control process on site (IC9) (ICS1=0.787); and minimised interface conflict through integration of construction simulation (IC18) (ICS2=0.774).