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This paper proposes an innovative risk-assessment strategy based on condition and importance criteria for power transformer maintenance in a transmission network. The condition assessment is performed by the analysis of different diagnosis methods such as electrical test, insulating oil test, and visual inspection. The importance assessment is evaluated from various aspects such as load criticality, impact on system stability, possibility of failure, failure consequence, damage to property, as well as social impact and environmental concerns. Weighting and scoring techniques are applied to determine the actual condition and importance of the power transformer with regard to condition and importance aspects. By combining the condition and importance assessment, the overall risk to the power transformer is assessed and differentiated into nine categories in the risk matrix from the lowest to the highest risk. Additionally, by applying distance 'd' technique, the risk-based assessment matrix for the power transformer can be identified into five zones: healthy, good, moderate, bad, and risky. These five zones are also represented by color indicators as green, blue, yellow, orange, and red, which are further interpreted to five steps of maintenance tasks. The transformer with longer distance 'd' is subjected to higher risk and should be maintained first. By this method, a total of 19 power transformers were analyzed and are presented as examples for risk-based maintenance. Then, risks of a total 598 power transformers are shown in the risk matrix. A computerized web application program is developed for practical implementation in a utility in Thailand. Finally, the systematic risk assessment and maintenance task of the power transformer fleet in Thailand are effectively managed. Thereby, the total maintenance cost of power transformer can be reduced. © 2014 Institute of Electrical Engineers of Japan. Published by John Wiley & Sons, Inc. [ABSTRACT FROM AUTHOR]

The article discusses the creation of risk management plans for Thai Ministry of Finance office, the Information Technology Center of Department of Comptroller General. The Office of the Public Sector Development Commission and Kasetsart University conducted a joint context analysis and found that the significant changes in the office will affect many public agencies, including its demographic, social and economical aspects. Twenty Department of Comptroller Generals participated in the project, who were trained and educated with the risk management concepts and the way they are implemented. The participants categorized the risk management plans into three types, which are technical, administration and personnel. Fourteen risk factors were identified by the participants.