Waiting until a favourite reference is nearly gone can leave a gap before the next order arrives. Reordering too early can tie up money in stock that the shop no longer needs. The useful question is how much demand you need to cover while replenishment is being arranged, and how uncertain that demand and timing are.
Begin with the current situation for the reference itself. A general impression that the collection is selling well is not enough. You need the units sold while available, the usable units remaining, relevant incoming orders and the supplier’s current estimate for the proposed purchase.
At a glance
- Use a delivery range when a single date would hide uncertainty.
- Count usable stock, relevant incoming units and reservations consistently.
- Choose a buffer for a reason and review it with new evidence.
In this guide
- Use a complete replenishment window
- A hypothetical trigger calculation
- Compare the trigger with the right stock position
- A trigger is not the order quantity
- Give the buffer an explicit purpose
- Revisit the plan before committing
Use a complete replenishment window
Clarify what the quoted timing includes. Does it begin when the order is accepted, when payment is received or at another agreed point? Does it end at dispatch or at the expected arrival? For your stock plan, the important interval is the time until usable goods are available to sell.
If the timing is a range, preserve the range in the worksheet. Replacing it with the earliest date may make the plan look tidy while removing the uncertainty you need to manage. Confirm the current expectation for each new order rather than carrying forward an old quotation.
A hypothetical trigger calculation
Imagine a reference has been selling at an observed average of two units per week while available. For this illustration, replenishment is expected in three to five weeks. The buyer chooses to plan around five weeks and adds a three-unit buffer for the uncertainty they are willing to cover.
Five weeks multiplied by two units gives ten units of expected demand. Adding the illustrative buffer produces a trigger of thirteen units. This is a simple planning rule, not a statistical service guarantee or a statement about Toodobem delivery times.
| Hypothetical input | Value |
|---|---|
| Observed weekly sales | 2 units |
| Planning lead time | 5 weeks |
| Expected demand during that time | 10 units |
| Chosen additional buffer | 3 units |
| Illustrative reorder trigger | 13 units |
Compare the trigger with the right stock position
Suppose there are eight usable units on hand, four confirmed incoming units due soon enough to support the period, and one unit reserved for an existing commitment. The simplified stock position is eight plus four minus one, or eleven units. That falls below the thirteen-unit trigger and prompts a reorder review.
Check dates before adding incoming stock. Goods due after the relevant selling window cannot cover an earlier shortage. Also check how your system treats reservations: if available stock already excludes them, subtracting them again would understate the position.
A trigger is not the order quantity
The trigger tells you when to review replenishment. The quantity depends on the intended period after arrival, expected demand, current commitments, the buying budget and the supplier’s quantity rules. Do not order thirteen units simply because thirteen appeared in the trigger calculation.
Decide how much stock you want available after the new order arrives, then account for what is already expected to remain. Apply the actual minimum or pack increments and check whether the resulting quantity is still sensible. A mathematically tidy target may need a commercially workable adjustment.
Use sales observed during periods when the reference was available. Including a long stockout as though it represented weak customer interest can distort the average. Conversely, a short burst immediately after launch may be unrepresentative. Keep the observation period beside the rate so its limitations stay visible.
Give the buffer an explicit purpose
The three-unit buffer in the example is a judgement, not a universal recommendation. A shop might accept an occasional gap in an experimental colour while protecting availability more closely for a central reference. The cost of carrying extra stock and the importance of continuity differ by product role.
Record why the buffer exists and what evidence would change it. If timing becomes more consistent or demand weakens, reconsider the extra units. If a one-off event caused a sales spike, do not automatically treat the event rate as the new normal.
Revisit the plan before committing
Use a current quotation and confirm open questions through Toodobem contact. Check that the reference, materials and specification still match the intended reorder, particularly if the original purchase was some time ago.
A dependable reorder process combines a simple calculation with a short review of its assumptions. The calculation makes the timing visible; the review decides whether the next commitment still deserves the cash and space it will require.
