Evaluation of causes of errors in bills of quantities for public building projects in Northeast Nigeria

Abstract

Bill of quantity remained the major document that offers early cost estimates of construction projects especially in traditional form of contract. It is known for the role of ensuring the achievement of cost, time, and quality performances of construction projects. However, BOQs nowadays were found to encompass errors which if not addressed may affect its sustainability. This research evaluates the causes of errors in BOQs for public building projects in Northeast Nigeria. Quantitative research design was employed where in-depth literature reviews were conducted and questionnaires were used for data collection. One hundred and forty structured questionnaires were administered to quantity surveyors. However, one hundred and twelve were returned and one hundred and five were validly used in the analysis. The relative severity index R.S.I evaluation of the data revealed that; Little/No knowledge of using computer software, Poor communication between quantity surveyor and the client, Inconsistent decision making by the client, Negligence of duties by QSs, and Incorrect dimensions in drawings were the five most severe causes of errors in BOQs. Moreover, the mean relative severity index was found to have influence of 66%. Quantity Surveyors should improve their computer literacy through attending workshops and trainings. Proper line of communications among project stakeholders should be established. Employers should inherit the culture of consistent decision making to avoid mixing up of actions. Finally, all team members involved in the production of BOQs should be up to their responsibilities and improve their services and quality of delivering responsibilities.