GPT or lbs/tap are measures of yield productivity. Certainly lots of things that could be measured and lots of ways to express it. Gallons per acre is another common way.
Undoubtedly though, for many (not all) producers, a desire to see a profit is what it comes down to, however I doubt that 1 out of 10 producers have records good enough over a long enough period of time to calculate it, but it can be done. See https://www.uvm.edu/extension/agricu...ules/node/7312 for lots more info on maple business tools. Mark Cannella (UVM Extension) and his crew are really good people to work with.
It is just as wrong to spend every penny possible to get a few tenths more gpt as it is to not spend some money (targeted wisely) to get more sap and increase your bottom line. It runs both ways.
I can tell you that I've presented various approaches to high yield production with folks many times. When you start talking about paying wages people have quite varied opinions. Some really don't want to include in, some do (business people will tell you that it should almost always be included). During one particularly interesting presentation I showed calculations including wages and one of the attendees gave me a real earfull about why his time shouldn't be included. Ten minutes later when I suggested something different as an option he piped up that he couldn't do that because it took up too much of his time.![]()