To measure its reliability for electric supply Bristol Tennessee Essential Services (BTES) a US utilities plus company, used a reporting scheme that used the number of customer minutes “on” versus the number of minutes “of f” to determine outage time. BTES set a goal of sixty minutes or less “off time” per customer per year. For the three years to 2017, BTES exceeded the target goal. In 2016, BTES saved 46.6 estimated minutes of outage time through its Automated Switching System. BTE...