Availability Measures. 4.2.1. Calculation of Availability Measures for Individual Transmission Line Circuits The calculation of the Availability Measures will be performed utilizing Outage(IMS) data through December 31 of each year. Separate Forced Outage(IMS) frequency and accumulated Forced Outage(IMS) duration Availability Measures shall be calculated as follows for each Transmission Line Circuit under ISO Operational Control within each Voltage Class. The calculations shall be performed annually for each of the Transmission Line Circuits utilizing all appropriate Outage data for the calendar year in question.
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Samples: www.caiso.com, Transmission Control Agreement, Transmission Control Agreement