Linear frequency is simple and direct. Everyone can understand how it works. For a given GRP level, you go to a simple equation and plug in the GRP figure. The result is the estimated frequency. From that, it's trivial to get your reach estimate.
Linear frequency is simple.
It's sort of like predicting air conditioner sales as a function of the month number. BBD and BBDX start by building some kind of theoretical understanding of how television audiences view. Then, parameters of that viewing pattern are adjusted to conform with known tabulations from Nielsen. To use the air conditioner analogy, we might build a model that includes such factors as cloud cover, humidity and discomfort, as functions of the month number, and then predict air conditioner sales from all of these. We can well expect both greater precision, and vastly improved explanatory capability.