TAM

TV Ratings refers to the percentage of the number of the individuals (or households) viewing a program within a duration out of the total individual or household viewers. As the important quantified index of the "eyeball economy", TV ratings are a scientific basis for in-depth analysis of TV audiences; the critical substratum of program scheduling and rescheduling; the principal index of program evaluation; and an effective tool for drawing up and evaluating media plans, promoting the utility of advertisement distribution.

Although TV ratings are a simple number, it indicates a series of complicated scientific processes behind the number which include the establishment survey, sampling, measurement, statistics and data processing.

CSM is China's largest and most authoritative professional TV rating data provider. Since its foundation in 1996, CSM has established the world's largest multi-layer and multi-mode TAM network. It covers over 35,000 households measuring over 1,000 main TV channels 24 hours a day, 365 days a year. CSM has successively established 5 different types of TAM networks, which include city diary panels, provincial diary panels, city peoplemeter panels, provincial peoplemeter panels and a national peoplemeter panel aiming to provide a full-range data service for different target audiences across time periods for different markets.