Deli stall cashier - opening scale-and-pricing checklist: zeroed scale, verified prices, and someone named to flip the evening discount - eight items in fifteen minutes

Build an opening scale-and-pricing checklist for a cooked-food
stall's cashier, walkable in the fifteen minutes before
opening, eight items, printed on one page at the register.

Format: each item has three fields - what to check / pass
criterion / what to do on failure. Follow this skeleton; leave
numbers as [ ] for the stall to set:

1. Scale level and zero
   Pass: bubble level centered; empty scale reads zero, and
   reads zero again after one press of the tare key
   Fail: shim to level and re-zero; a scale that won't hold
   zero is out of service today - switch to the backup and
   tag it "repair"

2. Test-weight verification
   Pass: the certified test weight reads its own value
   (within [±1] scale division on the last digit)
   Fail: last-digit drift gets logged and the scale stays in
   use; anything beyond parks the scale for service - an
   inaccurate scale is a credibility incident for a stall,
   not a maintenance footnote

3. Tare containers
   Pass: the tare table for every takeout box and bag in use
   is taped beside the scale; each item rung in the tare
   matching its container
   Fail: a container missing from the table gets weighed
   empty once, added to the table, and only then used

4. Scale prices against the price board
   Pass: each preset price in the scale checked against the
   board; today's repriced items always checked, others spot-
   checked three ways
   Fail: correct the scale preset on the spot and re-verify
   before selling

5. Time-based price switch
   Pass: the evening discount's effective time written on the
   board (e.g. [19:00]) and assigned to a named person - who
   flips it at that hour and self-tests by printing one
   receipt to confirm the discounted unit price
   Fail: unassigned at opening means assigned before opening;
   a missed switch discovered mid-sale means refund the
   difference to that customer and note it in the close-out

6. Receipt clock
   Pass: print one receipt; its timestamp matches the phone
   within [2] minutes
   Fail: correct the clock - with a drifting receipt time,
   tonight's hour-by-hour gap hunt runs on a bent axis

7. Payment codes
   Pass: only the current primary code on the counter; the
   backup code not displayed; any code changed today means
   the old one physically removed
   Fail: two codes coexisting - strip the old one now, and
   tonight's close-out includes a dedicated look at the
   backup-code pool

8. Power and network outage kit
   Pass: handwritten price board, calculator, and change
   float in their fixed spots at the register; the spot map
   taped inside the drawer
   Fail: restock what's missing - hunting for a calculator
   mid-outage is how the line remembers the day

Constraints:
- Every pass criterion must be decidable on the spot (a look,
  a test weight, a receipt) - "confirmed working" phrasings
  banned
- The whole list walks in under fifteen minutes; longer means
  the list is overbuilt, not the morning
- One printed A4 page with a tick block (date / eight ticks /
  initials), bound monthly - this is the cashier-side
  self-audit ledger

Why it is written this way

Weigh-and-price errors share a nursery: the fifteen rushed minutes before opening. Lights on, trays out, the braise pot needs chasing - eight checks look trivial, but each maps to a real, frequent loss: an unzeroed scale adds a bite to every sale (one home re-weigh becomes a credibility incident), an unverified scale leaves a standing mystery in every month-end reconciliation, a forgotten evening discount loses both ways (flipped early it eats margin, flipped late it eats goodwill). The list doesn't defend against stupidity - it defends against the low-grade errors that rush hour reliably re-manufactures.

The time-based price switch stands alone with two layers (a named owner of the flip plus a self-test receipt) because it's the only item that executes after opening - everything else closes when checked, but this one is future-tensed and exactly the thing the dinner rush buries; the self-test receipt separates "flipped" from "flipped correctly." The receipt clock check is chronically skipped, yet it's the foundation under the whole close-out: with a drifting timestamp, tonight's "what happened in the 6-to-7 band" is searched in the wrong coordinate system.

The tick block and monthly binding give the checklist its second identity: a ledger. Day to day it anchors execution; the day a dispute or an inspection arrives it becomes evidence - months of dated ticks argue better than any promise, the same philosophy as the comp-verification and rounding-log rules: at a register, trust runs on paper trails, not personality.

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