Yeah, I hear that a lot. But like some other users have pointed out, “Tuning”, in this case, is just another word for “Lying”. In my example above, one method puts down 1.17" of water, the other over 1.5" of water. They aren’t both right. They both use identical zone and soil definitions. If I believe the 1.5" by the Daily program is right, but want to use Monthly, I have to Tune/Lie about my soil conditions and zones until it comes up right. That’s darnright silly.
Not even Rachio can get everything 100% on every yard, and I’m sure they agree with that. So there’s /gotta/ be a method to fine-tune the results. That should /not/ be changing your actual conditions. It should simply be an Adjustment, overall, to the amount of water used. I wouldn’t call it a “Budget” like other systems do; that’s intended. But an Adjuster of some sort.
Just now thinking more about it, I think I see why it’s so difficult for Rachio to do this with their Flex Daily, at least: If I had an adjustment that overall just applied, say, 10% more water, Rachio could easily do that. But now the daily graph will show more water saturation (because nothing else was changed). So, sooner or later, it will think the ground is saturated, even though it may not be, and will not water when you want it to. Same with 10% less water. So, yes, that is a problem. We need something that affects how much water Rachio /thinks/ the soil needs. Maybe that does involve some lying.