Impact of Characteristics of Design-Bid-Build Delivery System on Construction Project Performance in Nigeria

Abstract

The study examined the impact of characteristics of Design-Bid-Build (DBB) delivery system on construction industry with a view to  enhancing project delivery. A total of 13 DBB distinguishing attributes were obtained via literature review. Primary data were used for this  study. Structured questionnaire was administered to consultants and contractors’ personnel in Lagos State, Nigeria. A total of 200  copies of questionnaires were administered and 148 copies which represent a combined response rate of 74 per cent were retrieved.  Data were analysed using frequency distribution, percentages and spearman’s rank order correlation. The findings indicated that  Construction cost is fixed at contract award (until Change Orders), Design is complete prior to construction award, Relative ease of  implementation, Low bid cost and maximum competition, Owner at risk to contractor for design errors and Design and construction are  sequential have positive direct effect on cost overrun. This study concluded that characteristics of Design-Bid-Build (DBB) delivery system  had significant impact on the expected performance of construction project and recommended that stakeholders should have clear  knowledge of unique characteristics of DBB delivery system for successful project execution.