Quantitative Analysis of the Effects of Variations in Public Building Projects
Year: 2017
Type: article
Study design: Observational Study
Abstract: Effects of variations in building projects have continued to be a worldwide chronic problem. It is imperative to uncover and understand detrimental effects of variations that lead to poor performance of building projects. Poor performance has led to difficult in achieving value for money in those projects. This study endeavoured to identify and evaluate detrimental effects of variations in public building projects in Tanzania. Pertinent literature was reviewed coupled with structured questionnaires administered to architects, engineers, quantity surveyors and procurement officers to get individual perception with regard to negative effects of variations. A total of 7 detrimental effects of variations were identified from literature and provided the basis for the formation of the questionnaire. Descriptive statistics, frequencies, Cronbach’s alpha reliability test and t-test were used to analyse and synthese data collected from questionnaires. This implies that, a quantitative research with regard to detrimental effects of variations was conducted for the collection of numerical data that was interpreted, analysed and explained statistically. The study finding indicates that the most five significant detrimental effects of variations were cost overruns, time overruns, dispute among project parties, rework and demolition and, productivity degradation in the development of building projects. The agreement among respondents in rating and ranking the factors of the detrimental effects of variations was found to be significant. It is recommended that: team work spirit among project parties; proper procurement of consultants and contractors; proper feasibility study of the project; sufficient time for design; inclusive design and; proper change control mechanisms would be beneficial and effective ways of mitigating detrimental effects of variations in public building projects. Findings from this study should help professionals, academicians, researchers and policy makers to improve construction performance.
Language: English
Field: Decision Sciences
Domain: Social Sciences
Open Access status: diamond
OpenAlex ID: W2598092301