Assessment of Causal Vectors of Time and Cost Overruns of Public Building Projects in Nigeria
Ezirim, Aloy C.
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Matters about overruns on cost and time within Nigerian construction industry have been there since ages. Although, frantic efforts have been made by previous researchers to confirm the existence of these turmoil’s but much has not been achieved in assessing the causat vectors of these thorny variables (time and cost overruns). To this effect, a study to close the information gap between overruns on time and cost in Nigeria and those factors responsible for them becomes necessary. In this direction, the study aims at reconfirming the existence of these overruns; identifying those factors causing them, view their individual contributions to the existence of overruns in Nigeria and proffer solutions to policy makers for better public building project executions in the country and beyond. For this study, primary and secondary data were gathered from different parts of the country. In the case of secondary data, the study made use of completed public building projects executed in different geo-political zones of the nation. In addition, the same zonal approach was adopted for the generation of primary data using interview and questionnaire methods. To this effort, qualified project experts were used as database. To be in line with normal research requirements of determining the population and sample size of the study, practical difficulties of obtaining exact population were observed, consequently, large samples of 360 project experts were used for opinion pools. After the administration of questionnaires, the study was done with a sample size of 240 respondents and studied one hundred and seventy-one building projects executed in Nigeria. Test and analyses of data were carried out using four hypotheses because of the nature and the number of things to consider for the study. Statistical tools like simple percentages, Likert summated scale, Kendall’s coefficient of concordance, and regression analyses with ANOVA (Analyses Of Variance). Pearson’s correlation coefficient etc. were used for the study. The study critically identified and considered the following factors for assessment: Government policies, Information Management, Project Management Techniques, Inadequate Project funding, Indigenous Project Technology and minor factors. A significant test was done using F – ratio and a table of different values of correlation coefficient (r) stated in chapter three. SPP (Special Program for Social Sciences) was used for the test. Eventually, the study found that highly positive significant relationship exists between the various overruns and those factors are strongly responsible for the existence of the various overruns while recommendations were that government should reform the construction industry by liberalizing all forms of project related policies, periodic training for project experts at all levels and applications of useful modern technologies using pertinent equipment’s.