Change orders occur frequently in most construction projects. Changes occur not only because of errors and omissions, but also for other reasons such as scope of work changes, unforeseen conditions encountered on the site. Several studies have attempted to quantify the effects of change order in the construction for project cost. The study in this area were sponsored by contactors, owner and consultant, where statistical model used to quantify the impact of the change order on the project cost. The research in this thesis is to investigate these issues in Tamil Nadu, towards developing a framework to minimize the change order at the start of the project to avoid time and cost overrun. Interviews were conducted to investigate the identified problems in more depth. The data collected are analyzed with SPSS software. A model is developed and validated to quantify the percent increase in the cost due to change orders. This model will provide the owner with an estimate of the cost of changed work; finally some recommendations and suggestions will be given to the construction industry.
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