Investigating impact of contractor related re-works on construction projects in Kampala.

Abstract

In construction industry, contractor related reworks are one of the major factors that affect the success of a construction project. It decreases the quality and productivity, and increases the cost and time of construction. Contractor related reworks commonly happens due to insufficient supervision, poor workmanship, wrong or defective materials, etc. This research intended to determine the impact of contractor related reworks on cost, time, quality and labour productivity. Also, in this research the extent to which the contractor related reworks affect the quality and labour productivity is determined. A questionnaire survey was undertaken among 50projects in Kawempe. The questionnaire survey findings revealed that, the reworks affected the cost by 5% to 15% of construction cost. Also, the findings indicated that, there was time delay due to contractor related reworks. They also indicated that contractor related reworks affect the duration by an average of 15% of construction duration