Choose the inventory measure that fits the decision

Choose the measure according to the decision you need to make. A reorder point is a trigger: act when available units fall to the quantity needed to cover expected demand during supplier lead time, plus any buffer. Use it to decide whether to place a purchase order; the inventory reorder calculator can help structure that calculation. Days of cover translates stock into time: current sellable units divided by average daily sales. Act when cover is shorter than replenishment time, or too long for a product’s shelf life.

Stock value is units on hand multiplied by unit cost. Use it to see how much cash is tied up and which products create exposure; ORVX reports inventory position, dead stock and remaining stock value. Sell-through is units sold divided by units received for a defined period. Use it to judge how quickly an item or collection is moving and whether the next buying decision should maintain, reduce or stop replenishment.

Match the measure to the inventory decision
MeasurePrimary questionWhen to act
Reorder pointShould I reorder now?When available stock reaches the trigger
Days of coverHow long will stock last?When cover conflicts with lead time or shelf life
Stock valueHow much cash is tied up?When exposure or dead stock needs attention
Sell-throughHow quickly is it moving?When buying quantities or assortment need review

Forecast from your own sales history

Start with SKU-level Australian orders, using delivered units by week or month rather than revenue. For each SKU, calculate baseline demand from comparable completed periods: total units sold ÷ number of periods. Exclude cancelled and returned orders from the demand series, then record the arithmetic so another person can audit it.

Separate unusual demand before applying the average. Tag units sold during a promotion, wholesale order, market stall, gift season or other one-off event. A chilli oil SKU selling 90 units in one promotion and 30, 28 and 32 in ordinary months should not use 45 units as its normal monthly demand. Its baseline is 30 units; the 90-unit promotion is a separate scenario, not proof of recurring demand.

For slow-moving gourmet products, use a longer window and report the number of selling periods, including zero-sales periods. One sale of six jars in six months is six units over six months, not six units per month. Compare the forecast with actual completed months and measure the error. ORVX can forecast coming-period store revenue from completed months and publish its backtested error; use its product profitability, dead-stock and remaining-stock reports to decide which SKU forecasts deserve attention, rather than treating revenue as demand.

Worked example with sample numbers

This example is illustrative. It uses sample numbers for a gourmet food store selling in Australia. They are made up to show the method, they are not a benchmark, and your own figures will differ.

Formula: Reorder point = daily units x (lead time + safety days).

Sample numbers: a reorder point
InputValue
Units sold per day5
Supplier lead time in days12
Safety cover in days8
Reorder at5 x (12 + 8) = 100 units
Cash tied up at costA$2702.05

Run the same sum with your own numbers in the free calculator, or browse guides for sellers in Australia and more gourmet food guides.

General information only: tax, duty and import rules change and depend on your situation, so check with an accountant or the official source before acting.

Eligible Shopify stores can see these numbers for their own store through the Founding 10,000 offer.

Set lead times and safety stock by supplier

Set a separate lead-time record for each supplier, measured from purchase order to saleable stock received. Include supplier processing time, dispatch cut-off, carrier transit and receiving delays. An Australian supplier shipping interstate may have different variability from one delivering locally; imported goods also need time for sea or air freight, customs clearance and inspection. Use the supplier’s actual delivery history, not its quoted transit time, and record late or short deliveries separately.

Use a supplier-specific reorder point: average daily unit demand × expected lead time + safety stock. Safety stock should cover the delivery variation you observe, with more buffer for routes or suppliers that frequently arrive late. Reduce that buffer for short-life products: an extra case of fresh cheese can become waste before the next delivery, so smaller, more frequent orders may be appropriate. For shelf-stable oil or preserves, a larger buffer may be practical if expiry dates support it. Review the setting after route, supplier, freight mode or customs conditions change. The inventory reorder calculator can help test the arithmetic, but the buying decision remains yours.

Calculate the cash cost of holding stock

Cash exposure is more than the supplier invoice. For each buying scenario, add purchase cost, inbound freight, storage, expected spoilage and expected markdown loss. Example: 100 units at $12 costs $1,200; $140 freight; $60 storage; five spoiled units cost $60; and markdowns reduce expected receipts by $40. The direct stock cost is therefore $1,500.

Treat working capital separately so you do not double-count it as an expense. It is the cash tied up before the stock sells: usually purchase cost plus freight, and any storage already paid. Compare that amount with the expected sell-through period and your next supplier payments. ORVX can show remaining stock value and dead stock; use the inventory reorder calculator to test quantities and costs.

Illustrative cash exposure for two stock scenarios
ScenarioPurchaseFreightStorageSpoilageMarkdownsDirect cash costWorking capital tied
100 units; $12 each$1,200$140$60$60$40$1,500$1,340
200 units; $12 each$2,400$220$100$144$120$2,620$2,620

Plan for Australia’s seasonal peaks

Separate recurring demand from calendar-driven demand. Christmas may lift hampers, premium pantry items and gifting bundles; Easter can shift demand toward chocolate, baking products and entertaining foods; Australian winter gifting often supports warming drinks, preserves and comfort-food assortments. Black Friday, Cyber Monday, Boxing Day and end-of-financial-year promotions should be modelled as promotional events, not as permanent changes in weekly demand.

Build a separate forecast for each peak using comparable prior periods, then apply a time-bound uplift supported by your own orders and planned promotion. Remove that uplift when estimating January, post-Easter or spring demand. Local harvest timing also matters: confirm each supplier’s Australian growing, packing and delivery window because availability can differ by state and season. For short-life products, buy against the event’s selling window rather than the annual average. ORVX can forecast a coming period from your completed months, show the method’s backtested error, and report remaining stock value and dead stock after the peak. Use that evidence to reduce the next seasonal forecast when last year’s uplift did not repeat.

Read the worked example and turn it into a buying rule

Treat the worked calculation as a conditional buying rule, not an automatic order. When a SKU’s saleable stock, including confirmed inbound stock, reaches its reorder point, compare the suggested quantity with the assumptions behind it: comparable unit demand, supplier lead time, safety stock, pack size, shelf life and expected wastage. If any input has changed, recalculate before buying. A reorder point tells you when to act; the order quantity tells you how much stock the model expects you to need.

Then test the signal against cash available after committed bills, freight and other near-term obligations. If the calculation signals 24 units but available cash funds only 12, buy 12, split the delivery or negotiate timing rather than treating the full recommendation as affordable. Review each SKU separately: order when demand is reliable and the stock will sell before expiry; reduce or defer when cash is tight or demand has weakened; investigate dead stock, unusual returns or a supplier delay before replenishing. Record the decision and review date, then update the inputs for the next inventory calculation.

A useful inventory plan connects three decisions: how much customers are likely to buy, how long replacement stock takes to arrive, and how much cash can remain tied up without creating expiry or markdown risk. Review those inputs by SKU and supplier, then change reorder points when sales patterns, lead times or Australian seasonal demand change.

Sources

How this page was made: drafted with AI from a brief, then checked by automated rules for arithmetic, sources and duplication. The sample numbers were calculated, not reported.