- 23:16:02
- Action received
- 23:16:04
- Payment captured
- 23:16:05
- Ticket accepted
- 23:16:06
- Inventory decremented
- 23:16:07
- Owner record written
This describes how Corvian designs and builds these systems. It is not a study of research participants, and it does not report outcomes for a client.
01What does the customer do?
The action has to be completable by a person standing outside a closed shop at 23:16, on a phone, with one hand. That constraint sets the whole interface: few decisions, no account, a price visible before the commitment, and a state the customer can trust once they let go of the phone.
CONSTRAINT / ONE HAND, ONE MINUTE, NO ACCOUNT
02What makes it real work?
An action becomes real work only after it is validated and reaches the person doing the job. Payment validates an order; availability validates a booking. Then the kitchen, chair, or calendar receives one clear state it can act on.
RULE / VALIDATE, THEN DISPATCH
03What still matters tomorrow?
The durable record carries the money, time, items, and state once, so the totals cannot disagree. The owner sees the decisions that need attention and enough history to answer what happened after the doors closed.
RECORD / WRITE ONCE, DECISIONS FIRST
FAILURE STATES ARE PART OF THE DESIGN
Payment declines
Nothing reaches the operation. The customer is told immediately and can retry without re-entering the order.
The kitchen is closed
The action is refused at the door rather than accepted and silently dropped. A closed shop should not be able to take an order it cannot fill.
The slot was taken first
The hold fails, the schedule is re-read, and the customer is offered the nearest genuinely free time instead of a confirmation that will have to be undone.
The record write fails
The money and the operational state are never allowed to disagree. The order is not treated as complete until the record exists.