Assessing the effect of rework on cost performance on building construction projects.
Abstract
Rework is considered as a significant figure in influencing the final construction cost of a given
building project in Kampala. Yet little is known about it causes and challenges and therefore it
remains an innate problem. The main objective of this research was to assess the effect of rework
on cost performance of on building construction projects with its specific objectives; To identify
the causes of rework and determine their degree of occurrence in construction, examine
challenges of rework on building construction projects and establish the relationship between the
rework and its effect on costs on building construction project. A set of forty-five rework causes
that were categorized under seven groups were identified from extensive literature review of
previous studies in the same field of study. To obtain relevant information to incorporate in the
study for data analysis, 45 questionnaires were distributed and 33 of them were retrieved. Data
was analyzed using descriptive statistics such as mean, Relative importance index by employing
Stata Software Version 15. The results of this research indicated that poor communication
systems, financial weakness, inadequate supervision of construction activities all with µ=3.97
followed by late designer input with µ=3.70 and design errors and omissions with µ=3.70 were
found to be the most factors leading to reworks on building projects. Loss of money was the most
challenge that was always encountered as a result of reworks on different buildings on the project
having about 52% response rate followed by loss of efforts having about 16% responses. The
relationship between the perception on the frequency of occurrence and cost of reworks was found
stronger in Concrete works (superstructure) and mechanical installations with ρ=0.933 and
ρ=0.798. The findings may help construction parties in Uganda case study of Kampala to
understand the causes of reworks and the measure to employ in order to mitigate the challenges
caused by reworks on building projects. The recommendations of this study may also apply to
rework in the construction industry of other developing countries