Abstract
Rework can bring negative effect to construction project. This research aims to identify the importance level of factors causing reworks in structural, finishing, and mechanical, electrical and plumbing (MEP) works by a way of importance performance analysis (IPA). In order to reach this objective, the research evaluates the degree of occurrence the factors in each type of works and analyzes the level of difficulty in preventing the occurrence of the factors. The results are based on questionnaire survey, involving general and MEP contractors in Surabaya. Design related factors are the most frequent and most difficult to prevent in structural and finishing works. In MEP works, the most frequent factors are tight construction duration and unclear instructions from owner and designer; whilst insufficient owner’s capital is the most difficult to prevent. The research finds two factors that have high importance level, i.e. design changes and insufficient detail drawings.
Highlights
Rework cannot be avoided in all construction projects
This study aims to determine the importance level of factors causing reworks on the structure, finishing, and MEP works from the contractor's point of view by a way of importance performance analysis (IPA)
Tight project schedule is the factor that most often causes rework on MEP works with a mean value of 3.75
Summary
Rework cannot be avoided in all construction projects. The occurrence of rework can cause many impacts on construction work in terms of productivity, time, and cost. Burati et al [1] and Barber et al [2] revealed that the costs arising from the emergence of rework are up to 20% of the contract value. Zhang et al [5] note that reducing rework on construction projects is seen as an effective way to increase development in terms of productivity, cost and time. It is argued that frequent factors causing specific construction work may be different. This will be elaborated in this current paper
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