The inventory measures behind each decision

Reorder point is the stock level at which you need to place a replenishment order. It represents expected demand during the replenishment wait plus a buffer. Act when available stock reaches this level, not when the shelf is already empty. A reorder calculator can help apply your own inputs.

Safety stock is the buffer held against demand or supply variation. It supports the decision to protect a product from going out of stock, but it is not a sales target. Days of cover converts current sellable units into time: available units divided by average daily unit sales. Use it to prioritise which products need attention first, especially when cash is limited.

Stock value is the cost value of units still held, rather than their potential sales value. It supports cash allocation and markdown decisions: a slow-moving helmet with high remaining cost ties up more cash than a fast-selling item with the same unit count. ORVX reports inventory position, dead stock and remaining stock value, alongside product and collection profitability.

Match each measure to the decision it supports
MeasureWhat it tells youAction it supports
Reorder pointWhen available stock reaches the replenishment triggerPlace a replenishment order
Safety stockHow much buffer protects against variationProtect availability or review the buffer
Days of coverHow long current stock may last at the current sales ratePrioritise urgent or excess-stock reviews
Stock valueHow much product cost remains tied upAllocate cash, reduce exposure or plan a markdown

Forecasting from your own sales history

Build the forecast at SKU level, using consistent periods such as completed weeks. For each SKU, record units ordered, units delivered, cancelled units, returned units, and the days or periods when the item was unavailable. Keep variants separate: a medium cycling jersey and a large jersey do not share the same demand history.

Use delivered units as the starting demand measure, then monitor returns separately. For illustration only, 20 units delivered with 2 returned is 20 units of fulfilled demand and 18 units retained. The first figure shows how much stock customers initially consumed; the second helps assess the likely net inventory effect. A cancellation should not be treated as delivered demand.

A simple run rate reduces noise. If a helmet sold 24 delivered units across 12 complete weeks, its forecast is 24 ÷ 12 = 2 units per week. This is useful when sales are relatively stable and you want a transparent baseline.

A recent-sales view responds faster to a change. If the same SKU sold 12 units in the last four weeks, the recent rate is 12 ÷ 4 = 3 per week. Use this view when the latest periods better represent current demand; use the longer run rate when the recent increase may be a short spike. Do not average in stockout periods as zero demand: mark them as constrained observations, because recorded sales understate what customers wanted.

Two SKU-level views of demand
MeasureArithmeticUse it when
Simple run rate24 delivered units ÷ 12 weeks = 2/weekSales are broadly stable and a less reactive baseline is appropriate
Recent-sales view12 delivered units ÷ 4 weeks = 3/weekThe latest complete periods are more representative of current demand

Worked example with sample numbers

This example is illustrative. It uses sample numbers for a cycling gear store selling in the UAE. 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 day9
Supplier lead time in days17
Safety cover in days6
Reorder at9 x (17 + 6) = 207 units
Cash tied up at costAED 33734.00

Run the same sum with your own numbers in the free calculator, or browse guides for sellers in the UAE and more cycling gear 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.

Lead time, safety stock and the reorder point

Build lead time from the full replenishment wait, not just the supplier’s quoted dispatch time. Include supplier processing, freight to the UAE, receiving and inspection, and any local delivery from the port, warehouse or distributor to your store. Keep every input in the same unit, usually calendar days, and use demand per day for the same SKU.

The formula is: reorder point = demand during lead time + safety stock. For illustration only, a helmet sells 3 units per day. Supplier processing takes 4 days, freight 7 days, receiving 2 days and local delivery 1 day: total lead time is 14 days. Demand during lead time is 3 × 14 = 42 units. With 18 units of safety stock, the reorder point is 60 units. When inventory position reaches 60, stock available plus confirmed units on order, less committed units, place the order.

Safety stock should rise when demand varies, suppliers miss dates or freight is inconsistent; it can be lower when those inputs are stable and replenishment is dependable. Review the assumptions after late deliveries, unexpected sales spikes or changes in shipping arrangements. The free reorder calculator can help test different lead-time and buffer inputs.

What inventory costs to hold

Separate the cash already committed from the cost of keeping it. Stock value is sellable units multiplied by landed unit cost: 20 helmets at AED 180 each tie up AED 3,600. Add a planning estimate for storage, receiving and handling, financing or payment terms, expected markdowns, and obsolescence. A seasonal jersey may have a low purchase cost but a high markdown risk if it remains after the riding season.

Reorder exposure is different. It is the cash a new purchase could commit: 40 units needed to restore the target level at AED 180 each creates AED 7,200 of exposure, even if current stock value is only AED 3,600. Use stock value to decide whether existing cash is trapped: reduce, bundle or stop replenishing slow, ageing products. Use reorder exposure to decide whether the next order fits available cash and expected margin before placing it.

Trigger purchasing from the replenishment calculation, not from total stock value alone. A fast-selling light with modest stock value can require action sooner than an expensive, slow-moving wheelset. Compare the proposed order’s quantity, landed cost and expected contribution with dead stock and remaining stock value. Use the reorder calculator for the quantity decision, then review product-level profitability before committing cash.

Use each cost measure for a different decision
MeasureWhat it showsDecision trigger
Stock valueCash already tied up in unitsReduce or rework slow, ageing stock
Reorder exposureCash the next order could commitBuy only when demand, margin and cash capacity support it
Holding and markdown costCost of keeping units availableChange assortment or exit before carrying cost erodes margin

Forecasting with your own sales

Choose the forecasting method that matches the SKU’s sales pattern. A simple average is suitable for steady sellers: 12, 10 and 14 units across the last three completed weeks gives a forecast of 12 units per week. A recent-period average gives more weight to current movement and is more useful after a sustained change in demand. A same-period comparison is useful for products with recurring seasonal demand, but only when you have comparable historical periods. Treat one unusually large order separately rather than allowing it to set the next replenishment quantity.

Use the forecast to estimate demand until the next realistic delivery, then compare that requirement with inventory available and your reorder point. Review the error after each completed period: if the forecast expected 12 units but actual demand was 16, record the four-unit miss and investigate whether it came from promotion, price, availability or a one-off order. For store-level revenue planning, ORVX forecasts a coming period from your completed months using arithmetic and publishes the method’s backtested error. That error describes forecast reliability; it does not promise that taking a particular action will produce a result.

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.