Besides manual movements, stock changes in these situations:

• Customer Grab&Go order - at checkout each meal's stock at the chosen location is checked; if it is 0 the order fails, otherwise a Remove movement (reason Checkout) is written and stock drops by the quantity ordered.
• Retail Menu > Update Stock / per-line Update Stock - adds the Quantity Needed (or the difference since the last run) as an Add movement.
• Update Stock with AI with Deduct as Sold on - a Remove (Sold) movement per row; undoing writes Add (Void) movements.
• Refund with 'Update Stock?' on Retail Grab&Go - Checkouts (or the wholesaler portal) - returns +1 per refunded meal.
• Finishing a delivery day on the admin Dashboard - wholesalers' purchased meals for that day (not refunded or delivered) are added to their wholesale location's stock.
• Wholesaler portal > Edit Stock - the wholesaler removes stock at their own location.

Every one of these runs the stock-alert check afterwards.