Most distributors have a solid handle on what happens once a purchase order exists — receiving, checking it against the delivery, paying the bill. What's far shakier is the decision before that: what to order, and when. In a lot of businesses that decision is still a Friday-afternoon walk around the warehouse, or a buyer's memory of which lines "felt low" this week — which means the business finds out it's short of a fast mover the same day a customer orders it, and finds out it's overstocked on a slow mover about six months later, when it's quietly written off.
Why "reorder when it looks low" doesn't work
Eyeballing stock feels manageable when a warehouse holds fifty lines. It falls apart well before a thousand, and it fails in the same three ways every time:
- A fast-moving line runs out between checks, and the order to replace it doesn't go in until it's already backordered a customer
- A slow-moving line gets reordered anyway, because "it looked a bit low," and joins stock that was already sitting there too long
- Nobody accounts for how long the supplier actually takes to deliver — so an order goes in with two weeks of stock left against a five-week lead time, and the gap becomes a stockout by the time it lands
- A buyer leaves or goes on leave, and the informal knowledge of "what usually needs ordering" leaves with them
What a real reorder point actually needs
A reorder point that works is built from three numbers, not a gut feel — and none of them is complicated on its own:
- How fast the line is actually selling, based on recent sales — not a number set once when the product was first listed and never revisited
- How long the supplier takes to deliver, from placing the order to it landing on the dock — the same lead time that varies supplier to supplier and season to season
- A minimum stock level, or safety buffer, that covers demand during that lead time so a normal fluctuation in sales doesn't tip straight into a stockout
- A suggested order quantity that's a sensible amount to buy — not just "enough to get back to minimum," but pack sizes and case quantities the supplier actually ships in
Put those together and a stock level crossing the reorder point should generate a suggested purchase order automatically — against the right supplier, at the right cost and pack size — for a buyer to review and release, rather than a warning that gets noticed once someone happens to be looking at that report.
Where it gets harder: multiple suppliers and moving lead times
The formula above assumes one supplier and a stable lead time, and real wholesale purchasing rarely stays that tidy. The same product might come from two suppliers at different costs and lead times, one used as backup when the primary is out. A supplier's lead time can stretch around a public holiday or a shipping delay without anyone updating the number that drives the reorder point — which is exactly how a business that "always orders two weeks out" gets caught by a five-week wait it didn't plan for. Reorder logic that doesn't track lead time per supplier, and flag when it's drifted, quietly goes stale the same way a minimum stock level set once does.
It still has to become a real purchase order
A reorder suggestion that a buyer has to manually retype into a separate purchasing system is a second chance for the numbers to drift before it's even placed. Run on the same data as purchasing and goods receipt, a triggered reorder point should turn into a purchase order a buyer can review and release with one decision, and what lands against it reconciles the same way any other delivery does — short, over, or on the money.
Different for perishable and catch-weight stock
For food and beverage lines, replenishment isn't just about not running out — ordering too much of a short-dated line turns straight into a write-off rather than dead cash sitting on a shelf. A reorder point for those lines has to work alongside FEFO rotation and expiry visibility, and account for catch-weight variance in what actually arrives against what was ordered by weight.
Built around how your business actually buys
Some lines need a strict formula. Others need a buyer's judgement layered on top — a known seasonal spike, a promotion coming up, a line about to be discontinued that shouldn't reorder at all no matter what the formula says. Tell us how buying decisions actually get made in your business and we build the reorder rules, supplier-specific lead times and override logic into your Cognit system, on top of the same purchasing and inventory data everything else already runs on — rather than a generic min/max formula that doesn't match how your buyers actually work.
Stop finding out on the day the order comes in
If replenishment in your business currently runs on a walk around the warehouse or a buyer's memory, it's worth seeing what a proper reorder point looks like against your own sales history and supplier lead times. See what's included or book a demo to talk through how buying decisions get made in your warehouse today.
Frequently asked questions
What's the difference between a reorder point and a stocktake?
A stocktake tells you what's actually on the shelf right now, corrected against what the system thinks you hold. A reorder point is forward-looking — it's the stock level that should trigger a purchase order before you run out, based on how fast a line sells and how long the supplier takes to deliver. You need an accurate stocktake for the reorder point to mean anything, but they answer two different questions: one is 'what do we have,' the other is 'when do we need to buy more.'
Isn't a simple minimum stock level enough?
It's a start, but a flat minimum ignores the two things that actually drive when you should reorder: how long the supplier takes to deliver, and how fast the line is currently selling. A minimum set once and left alone doesn't know that a supplier's lead time stretched from two weeks to five, or that a line's sales tripled after a promotion. A reorder point that accounts for lead time and recent velocity catches both — a flat number set six months ago catches neither.
How does this connect to purchase orders and goods receipt?
Directly — a reorder point that fires should generate a suggested purchase order against the right supplier, at the right pack size and cost, not just a warning that gets noticed a week later. And what you actually raise the PO for should reconcile against what lands, the same way any delivery does — see our guide on goods receipt discrepancies for what happens once the order those numbers.
What about seasonal or promotional demand spikes?
A reorder point based purely on a long-run average will always be a step behind a spike or a lull — it reacts once the average has already moved, by which point you've either stocked out or overbought. That's exactly the kind of business-specific rule we build in rather than force onto a generic formula: a seasonal uplift ahead of a known period, a manual override for a promotion, or a different reorder rule for a line you know is about to be discontinued.
Does this apply the same way to catch-weight or perishable stock?
The underlying logic is the same — don't run out, don't overbuy — but the consequence of getting it wrong is sharper. Overbuying a shelf-stable line ties up cash; overbuying a short-dated line turns into a write-off. For those, the reorder point has to work alongside FEFO rotation and expiry visibility, not just a stock-on-hand number, so what you're about to order accounts for stock that's about to expire before it can sell.
