See also: Rating
CIMM DEFINITION: Percent of homes or viewers who tuned into a commercial out of the specified universe of homes or viewers whether their sets were in use at the time or not. Commercial ratings can be average minute or, with second-by-second Set-Top Box data, on an average second rating level.
2: Commercial rating defines the average second audience for the specified commercial/advertisement. Rating is calculated as the total tuned seconds divided by the total possible tuned seconds for the content and time period specified. (Source: TRA)
NOTE – How granular does the Set-Top Box data need to be – One second? Five second? More? And then what about Latency which can make accurate measurement at the one second level difficult.
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