Bubble tea monthly equipment maintenance SOP - food-safety water-line items are hard commitments missed ones get made up the same month, efficiency items may slip one week, and every frequency number comes from the manual, never an industry default

You are an equipment technician for a bubble tea
chain. Write a monthly equipment maintenance SOP for
our stores - filable, and handable to store managers
for scheduling. Cover six machine classes: sealing
machine, ice maker, water filtration, refrigeration
(fridge and freezer), water boiler, tea brewer and
shaker.

Four fields per machine:
- Maintenance action: specific to which panel comes
  off and what cleaner is used - food-contact
  surfaces specify food-grade cleaner only
- Frequency: numbers left in [brackets] for me to
  fill from the equipment manual and this shop's
  water condition - whatever the manual omits gets
  requested from the manufacturer, never copied
  from an internet "industry standard"
- Who: shop-self-service / technician visit, decided
  item by item
- Record: which log sheet, whose signature confirms

Two tiers (the core structure of this SOP):
- Tier A, water-line items that touch food safety:
  ice-maker water path and bin, filtration
  cartridges, boiler tank - frequency is a hard
  commitment; a miss must be made up within the
  same month and reported to the manager.
  Cartridges swap the moment their trigger fires
  ([pressure-drop reading or manual interval]) -
  never "run it to month-end."
- Tier B, efficiency-and-lifespan items: sealer
  die film residue, condenser dusting, shaker
  drivetrain - may slip at most [1] week, with
  the reason and the makeup date written into
  the log

Execution structure:
- The monthly maintenance day is fixed at [day X
  of each month], off-weekend, [N] hours per
  visit, one section of the bar cordoned
- One photo of each machine before and after,
  attached to the record - in a dispute, photos
  beat memory
- Shop-self-service items become illustrated step
  cards: one line of text and one image slot per
  step; the technician spot-checks execution
  quality quarterly

Constraints:
- Every frequency number traces to the manual.
  The SOP must not contain "typically every three
  months" defaults - different water conditions
  deserve different intervals, and copying a
  default transfers food-safety liability from
  the manual to the SOP.
- Maintenance actions must not read as repair
  actions - self-service items never involve
  opening water lines or wiring; state the
  boundary.
- No new forms or systems: use the existing
  maintenance log, or one A4 template if none
  exists.

Why it is written this way

The two-tier split is the skeleton of the whole SOP. A missed water-line service means a customer drinks it; a missed condenser cleaning means the machine dies two years early - those two consequences cannot share one "please try to keep the schedule" tone. Hard commitment versus slip-allowed tells the manager, at the end of a month with schedule conflicts, which side gives and which side never moves. The cartridge clause - "swap the moment the trigger fires, never run to month-end" - stands alone because an overdue filter is the one item most reliably argued away with "it still works."

Leaving frequencies blank guards against the quietest form of fabrication. A model (and every listicle) wants to say "replace every three months," but the same filter model under two water conditions can differ by a factor of two in real life; a copied default makes the SOP look complete while executing as either waste or overdue - wrong in both directions. Requesting the missing number from the manufacturer is a hassle, and that is precisely where food-safety liability belongs.

The before-and-after photos are learned from disputes: whether the bin was cleaned or the cartridge swapped is unprovable three months later, and when technician and shop disagree, photos are the only evidence that requires no memory. The quarterly spot-check depends on them too - without photos, checking the log means redoing the work.

Separating self-service from technician visits item by item, with the no-disassembly boundary written down, keeps the SOP from becoming an incident report. Every veteran technician has seen "clean the condenser" interpreted as "open the machine and dust it" at least once; the boundary belongs on each step card, because nobody holding a step card flips back to the preamble.

Variables