"Reorder point" sounds like inventory-management jargon. In practice it is the line that separates a store that rarely runs out of anything from the store that keeps answering "it's in the stockroom" with uncertainty. Here is the plain version.

The three numbers per product

For each product, three things matter:

  • How much it sells — a daily average.
  • How long restock takes — from order to arrival.
  • How bad running out is — is the shelf empty a few hours, or a lost customer for good?

From them come two useful values:

  • Safety stock — the buffer: average daily sales × how many days of tolerance you want.
  • Reorder point — the stock level where it is time to buy: expected sales during restock lead time, plus safety stock.

A product selling two per day with a one-week lead gets a reorder point around fourteen pieces, plus a small buffer. The math takes two minutes per product. The discipline of maintaining those numbers is the entire battle.

Why the spreadsheet version fails

The same formula in a spreadsheet has one weakness: upkeep. Someone must check every product every day, remember the supplier is usually late, and notice that the size sold out last month the same way. That person quits — leaves, gets busy, or just misses the alert badly.

Software replaces the habit with a rule: the system tracks the current stock, knows the reorder point, and shows you the list. The alert appears whether or not anyone remembered to look. That is the entire difference — not the formula, the enforcement.

What a good reorder workflow looks like

  • A priority list, sorted by urgency: "below reorder point since Monday" first.
  • Lead-time awareness: products with slow suppliers alert earlier.
  • One weekly review — usually a single screen — where the owner decides, supplier order, or wait.

That is the difference between a store that trusts its shelves and a store that double-checks everything on Satdays.

Start small

Pick the few products that hurt most when they run out. Set their safety stock and reorder points, and run one month. Watch month-end stock value, the number of stockouts, and how long replenishment took. Then scale the same exercise across the catalog.

If you want to set these rules up for real — including the weekly review habit — RetailOS formalises the ready to go. Or just start a conversation and we can help you stand the numbers correctly for your categories.