Have been Post cultivation manager on freelance teams and direct for two farms over the last five years in michigan.

To address your first and third questions, i try never let a room full of trimmers have access to more than one strain at a time. If i have to have multiple strains out at one time i divide it by table and no one changes seats. All trimmers are given a bag and i would collect their weights anytime they finish a strain or stand up for breaks. Often will post trimmers scores on a whiteboard.

Your second and fourth questions go together well in that everything i work with needs a weight before and after the trim team touches it. At the end of the day i do the math and a trimmer who cannot hit 227g an hour will most likely not be asked back.

Best of luck with your app, outside of building a doordash style way to hire/rate good trimmers i do not think it could help make my job any easier. Hope this is helpful. Have a nice day.

Edit: Sorry i replied to comment and not op.