> It's a good reason to have both. I’ve never been to a store that only had self checkout, I think the equilibrium is one bank of self checkout + a bunch of no

> It's a good reason to have both. I’ve never been to a store that only had self checkout, I think the equilibrium is one bank of self checkout + a bunch of normal registers. > 2 out of 4 machines are, at any given moment, locked and waiting for a supervisor > where a dedicated supervisor would ensure problems get resolved quickly Sounds like an implementation issue. The grocery store I typically use has one bank of 6 self checkout machines with a dedicated attendant who seems to be able to resolve any issues. It’s common for 1 or 2 of the machines be down though. They also have 4 to 14 normal checkout lines open depending on how busy the store is. I rarely use self check but it seems like a good tradeoff vs a 5th line being open when things aren’t that busy.