It is a bottleneck, because the experienced human checker is only entering orange codes for one person at a time. There could be ten people all checking themselves out simultaneously. Even if one or two get slowed down by a menu, it’s still a net decrease in average time spent at checkout.
It is a bottleneck, because the experienced human checker is only entering orange codes for one person at a time. There could be ten people all checking themselves out simultaneously. Even if one or two get slowed down by a menu, it’s still a net decrease in average time spent at checkout.