Illiterate or not, with this system, you can "read" the order at a glance rather than having to read a list of items or decoding a set of symbols. That might shave a second per order.
Another point, ink in markers run out and thermal printers frequently run out of paper at inopportune times. I presume condiments are well stocked. No hunting for a new marker or fetching a new roll of receipt paper with this system.
Illiterate or not, with this system, you can "read" the order at a glance rather than having to read a list of items or decoding a set of symbols. That might shave a second per order.
Another point, ink in markers run out and thermal printers frequently run out of paper at inopportune times. I presume condiments are well stocked. No hunting for a new marker or fetching a new roll of receipt paper with this system.