Title:
EFFECTIVENESS OF THE DESIGN AND BUILD PROJECT DELIVERY APPROACH ON PUBLIC BUILDING CONSTRUCTION PROJECTS IN TANZANIA

Authors:
Wencelaus Patrick Kizaba and Zaipuna O. Yonah, Tanzania

Abstract:
The study evaluated the effectiveness of the Design and Build (D&B) approach on public building construction projects in Tanzania. It examined schedule management, budget management on D&B and quality on D&B project execution. Utilizing Resource Dependence Theory and the Theory of Project Management, the research employed a mixed-methods approach, collecting data from 132 questionnaire respondents and 15 interview participants. Respondents were selected using a stratified random sampling technique. Data were gathered online using Kobo Toolbox, with Excel and R software (version 14.4) used for the analysis of quantitative data, while qualitative data were analysed using manual content analysis. Findings reveal that, inadequate planning and poor resource management significantly disrupt schedules and lead to budget overruns, primarily due to design issues. While the D&B approach generally meets quality standards, issues like workmanship and design changes necessitate rework. In conclusion, while the D&B approach usually maintains quality, the study reveals that enhanced planning, budget management, and quality control are essential to overcome delays, cost overruns, and rework. It recommends improvements in these areas, along with better training and feedback mechanisms. The study also suggests implementing more training and external audits to enhance project execution.