Although South Korean construction companies have significantly increased their share in the international construction market, the work scope of their projects has been limited to detail design and construction, instead of expanding their market to the earlier phases of project execution. South Korean companies should also expand their capabilities to project management consultancy (PMC), enabling planning and scheduling knowledge to handle various risks associated with each work package. This research involved developing a Unit Activity Sequence Model (USAM) for industrial plant construction projects to minimize project risks. A Standard Sequence Logic Unit was set up to establish the initial scheduling phase of plant projects, and to understand objectively construction flows and the association between construction events, etc. Previous research has a scope that is very limited to specific plants, and it is currently unsatisfactory to understand the flow of overall plant construction. This research is different from other studies busing USAM per work package in the initial planning process, in order to help determine the overall flow. It is based on various references and extensive opinions collected from the schedule management experts as a reason for the lack of case studies. Thus, more research and process-related data collection needs to be added from the experts in various research companies.
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