The problem is the lack of organization in register lines at McDonald's

1. Gather information by reviewing how other restaurants and high customer flow industries have handled the problem.

2. Solutions include single file serpentine lines, dedicated single file divided lines for each register, order here/pay here signs, and a single line with customers being called to the registers as they open.

3. A single serpentine line appears to be the most common in the fast food industry and the one that requires the least amount of attention by the employee and the customer.