I own a sawmill and use Trello for order tracking, often times I create checklists for specific orders and am looking for a way to to show a specific check list item as partially completed.
An example would be: I'm cutting 150 2x4. If those are my items and my employees get through 60 2x4 right now that's just and incomplete item, but I'd like to be able to show that they have finished 60 so they can know where they are when they start up again, while still retaining the total in the check list (meaning then don't just edit the list to show 90)