Yes I can see that the lower the level at which you provide choice the harder it would be to keep the UI clean. That said, I do think that providing these options at as low a level as possible does give greater flexibility. Maybe you could provide a way to add customised versions of the zimmerman formula where percentages are applied and allow these custom versions to be attached to stations within programs or at least to individual programs? The seasonal thing might be best dealt with by having the ability within programs to select the months when the program is active. Anyway, I’m sure my understanding of how it works is fairly simplistic and you will be much better placed to understand what will work and what won’t but thanks for taking the time to consider the options.
Cheers,
Phil