Maintenance Strategy: Burden to Importance Approaches
Maintenance Strategy: Burden to Importance Approaches
著者:
Jun Su Ha Poong Hyun SEONG
発刊日:
公開日:
Active Searching for contradictory evidenceBurden to Importance RatioImportance MeasureMaintenance EffectivenessPSAs
概要
In order to enhance maintenance effectiveness by using risk information, Burden to Importance Ratio (BIR) is used in this study. The BIR is a measure representing the extent of maintenance burden (resources or activities) imposed on a System, Structure, or Component (SSC) in comparison with the importance value of the SSC. Therefore maintenance burden imposed on the SSC having high BIR can be reduced to the extent of its importance. The evaluation of BIR were applied to 22 valves selected among 516 Motor Operated Valves (MOVs) tested in In-Service Test program of Ulchin unit 3 in South-Korea. Among them, 13 MOVs were evaluated to be reducible from the existing maintenance burden. In addition, a qualitative approach called “active searching for contradictory evidence?h is utilized to complement limitations associated with the BIR. A case study regarding the active searching for contradictory evidence shows that challenges no t considered in the BIR assessment can be identified and evaluated. Consequently, we conclude that burden to importance approaches incorporating the quantitative measure, BIR, and the qualitative evaluation based on active searching by experts can be a successful strategy for enhancing maintenance effectiveness.
