Statistical approaches to selecting domestic meters for test

The american electric power company (AEP) system is an integrated and interconnected electric power network, including six principal operating companies serving parts of seven states: Michigan, Indiana, Ohio, West Virginia, Virginia, Kentucky, and Tennessee. The majority of its revenue watt-hour (whr) meters are selected for test on the basis of geographic areas, each of which include one-eighth of the meters in an operating company. Each year all meters in the geographic area are tested, with some minor exceptions, so that over a period of 8 years all meters on the system are tested once.