Mostly this. Obviously, this assumes shared understanding of assignments as "things I'm working on" rather than "queue of things and also commitment do to every

Mostly this. Obviously, this assumes shared understanding of assignments as "things I'm working on" rather than "queue of things and also commitment do to everything". Combining the original "one open ticket" rule with the second approach is rather bad. That's why I hope it was used in the context of the first approach.