Aging equipment maintainability assessment for management of critical utility assets

Reliability and Maintainability Improvement of Substations With Aging Infrastructure

“…Another observation is that either insufficient maintenance or over-maintenance decreases system reliability. This observation is similar to a previous study at the equipment level [15], [16].…”

“…In these studies, maintenance is generally modeled as active failures [4]- [8] for the purpose of maintenance planning [9], [10], and enabling studies of equipment maintenance and aging processes [11], [12]. Basic system studies to determine the impact of maintenance on aging equipment have also been conducted using analytical and simulation-based approaches [13]- [15]. Methods of incorporating uncertain failure probabilities/rates into stochastic models have also been developed [16], [17].…”

Multiperspective risk analysis for aging asset fleet management

“…1, the risk analysis module relies on asset performance models [12] O&M cost assessment that outputs economic cost-related indicators, equipment reliability, and other indices such as maintenance delay. Moreover, the equipment importance quantification module is necessary to aggregate information such as safety, criticality, environmental condition, etc.…”

“…Risk indicators can be classified as: 1) performance risk indicators, giving historic performance risk information, and 2) exposure risk indicators, giving mainly present and future risk expectation information with respect to different threats and uncertainties [11][12][13][14].…”

“…This is illustrated and presented in [17]. Detailed remaining life estimation is available from [12].…”