Design Error: A Source of Cost and Time Overrun in Construction Projects

Abstract

The study investigated the impact of design error on cost and time overrun of construction in Nigeria. Descriptive research design of the survey type was used. The opinion of Consultants, Contractors and Clients were sought through Questionnaires and interviews. The research studies reveal that design error affects the final cost of a construction project causing cost and time overrun. Additionally, the research revealed that the issue of cost and time impacts on project construction could be managed by using construction recognized and accepted methodologies which identifies and quantifies the overall impact to the project. It concludes that unclear scope of work or change in scope of projects in work; time and inexperience of the Architect and inaccuracy of the design documents are the major causes of design error in construction projects in Nigeria .Based on these findings, the researchers recommended adequate design review, proper planning and inspection of projects, clear scope of work and adequate time be given to produce clear and error free designs and specifications.