Assessment of the Factors Affecting Accuracy of Pre-tender Cost Estimate in Kaduna State, Nigeria

Abstract

Accurate cost estimates are crucial to the effective realisation of construction projects. Researchers have noticed the presence of inherent inaccuracies in the bill of quantities prepared by estimators (Quantity surveyors). This paper aimed at examining the factors affecting accuracy of pre-tender cost estimate in Kaduna state, with a view to improving the predictive ability of clients, consultants, and contractors for better estimating. A total of 66 questionnaires were administered with 35 to consultants (53.03%), 15 to contractors (22.73%) and 16 (24.24%) to clients within Kaduna using the simple random sampling technique. The collected data were analysed using the Relative Importance Index and correlation analysis. The study found out that a statistically significant relationship existed between the clients, consultants, and contractor on the essential factors affecting accuracy of pre-tender cost estimate. It was concluded that: Experience and skill level of the consultants, Project teams experience on the construction type, clear and detail drawings and specification, completeness of cost information, accuracy and reliability of cost information are the most significant factors affecting accuracy of pre-tender cost estimate. It was recommended that Clients should always engage the services of skilled professionals to undertake the consultancy services in cost estimating process.