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This study proposed a framework of Non-Techical Skills (NTS) that integrates existing NTS frameworks, such as CRM(Crew Resource Management), SRM(Single-pilot Resource Management), and TEM(Threat and Error Management). First, CRM and SRM were compared, and most of the elements of CRM and SRM were found to be commonly useful in multi-crew and single-pilot operations. Second, Risk Management in SRM was compared with TEM, and these were integrated into a single framework called Unified Risk Management. Third, DODAR model, which is widely used as a checklist for Decision Making process, was modified and extended to cover all the processes of Risk Management and proposed VNS/DRODAR model.