Rework in the Nigerian Road Construction Projects: Prevention rather than Remediation

Abstract

Rework is a significant factor contributing to both time and cost overruns in construction project delivery processes. It has been observed that rework costs in building and engineering projects range from 5% to 20% of the contract value, leading to adverse implications in various sectors such as road construction, commercial buildings, and industrial buildings. This study is aimed at identifying the main causes of rework in road construction projects in Nigeria. Quantitative research was conducted using a structured questionnaire distributed to professionals in the Nigerian Construction Industry. Out of the 98 questionnaires distributed to Quantity Surveyors, Land Surveyors, Services Engineers, and Civil Engineers, 71 valid responses were analyzed, representing a 72% response rate. The data analysis involved calculating the importance index of various factors and conducting an analysis of variance (ANOVA). The findings revealed that factors such as pressure to finalize work, scope definition, lack of design audits, inadequate training, misinterpretation due to knowledge gaps, omissions of checks, and incorrect information distribution were the primary contributors to rework in road construction projects. Interestingly, the one-way ANOVA showed no significant difference in opinions among respondents from different professional backgrounds within the Nigerian Construction Industry. By pinpointing these causes of rework and considering professional perspectives, this study offers valuable insights for mitigating rework challenges in Nigerian road construction projects. It emphasizes the need for proactive measures to address these causes, prevent rework, and enhance overall project efficiency.