Abstract:
Many construction components were modified and changed during construction phase in order to meet project requirements. This construction change may affect construction cost, project duration, and construction quality. This change can be occurred from several factors such as owner, contractor, workplace environment, drawing etc. In addition, causes of construction change are hardly to predict and these can be defined as an inevitable risk. To minimize this problem, the research aims to assess the important factors that cause to change in structural works. This research adapts the concept of risk management to develop the factors and criteria for evaluating causes structural change from contractor's perspective. The research method begins with review the factors that cause to change in construction projects. Then these factors are reviewed and confirmed by interviewing from 30 professionals on their experiences on change in structural works. Based on the questionnaire data from 106 data, the research develops criteria and scales for evaluating the frequency and financial impact for a construction project. Next, each factor is assessed from construction projects. Finally the analysis of important factor is calculated from evaluating the scores of frequency and impact. Based on the interview from professionals' experiences, the result highlights the three most important factors leading to change are owner, contractor and designer. Interestingly, most contractors are experienced on the responsibility of construction change. In addition to this result, the analysis of data from 76 data found that the most important factor leading to the change occurs from owner's requirement whereas the less important factor leading to the change is flood. The benefits of this research can help project managers to identify the important factors leading to change in structural work.