Research Paper
Year: 2018 | Month: April-June | Volume: 2 | Issue: 2 | Pages: 25-35
Assessing the Severity of Errors in Bills of Quantities for Public Building Projects in Nigeria’s Construction Industry
Abdurrahman Aliyu Jalam1, Nuru Gambo1, Alhassan Dahiru2, Aliyu Ahmad Aliyu3
1Department of Quantity Surveying, Faculty of Environmental Technology, Abubakar Tafawa Balewa University, Bauchi
2Department of Quantity Surveying, Faculty of Earth and Environmental Sciences, Bayero University, Kano
3Department of Estate Management and Valuation, Faculty of Environmental Technology, Abubakar Tafawa Balewa University, Bauchi
Corresponding Author: Aliyu Ahmad Aliyu
ABSTRACT
Bill of quantity is the major document that provides initial cost estimates of construction projects in traditional procurement system. It helps in addressing the three most essential aspects of construction projects (cost, time and quality). However, BOQ is faced with professional errors which if not addressed may affect its sustainability. This research investigates the severity of errors in BOQs for public building projects in Nigeria’s construction industry. Questionnaire and document analysis were employed as instruments of 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. Fifteen BOQs for different public building projects in Nigeria were examined. The severity index analysis of the analyzed questionnaires revealed that the lowest severity indexes are 0.743 (74.3%) and 0.777 (77.7%) for pricing and preparation errors respectively. Document analysis results uncovered that 68% of the items in the BOQs examined had 28% above recommended transited rate while the remaining 32% of the items had 15% lower than the recommended transited rate as a result of error in transition of rate. The research also identified some other forms of errors in the BOQs. It is recommended that quantity surveyors should improve in their skills in BOQ preparation. Architects and Service engineers should also improve in the production of their design drawing.
Key words: Bills of Quantities, Construction Industry, Error Severity, Nigeria and Public Building Projects,2
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