The first hurdling block, which must be overcome, is that old-school media math is based on the limitations of traditional, linear, analog media, and doesn't reflect the realities of non-linear, digital media.
Isithiyo sokuqala, okumele sinqotshwe, ukuthi izibalo zemidiya yesikole esidala zincike emikhawulweni yemithombo yendabuko, eqondile, imidiya ye-analog, futhi ayikhombisi amaqiniso ezinto ezingekho emgqeni, ezokuxhumana ezidijithali.