Min/Max Stock Policies

Set a floor and ceiling for each item so reordering tops you up to a sensible level automatically.

4 lessons 35 min 5-question assessment 70% to pass

What you’ll learn

Explain minimum and maximum stock levels

Calculate a top-up order quantity

Set min and max sensibly per item

Tune the levels as demand shifts

Lesson 1 of 4 Reading 8 min

Minimum and maximum levels

A min/max policy sets two lines for each item: a minimum (the floor you should not drop below) and a maximum (the ceiling you should not exceed). Stock should live between them.

It matters because two simple numbers replace constant judgement calls — the minimum guards against stockouts, the maximum guards against overstock, and anyone can manage stock by keeping it between the lines.

For a SKU you might set min 50 and max 200. Below 50 you risk running out before restock; above 200 you are freezing cash in excess. The band from 50 to 200 is your healthy zone, and the policy makes "are we okay on this item?" a glance, not a calculation.

Key takeaways

Min is the floor; max is the ceiling.
Min guards stockouts; max guards overstock.
Stock should live between the two lines.
Example: min 50, max 200 defines a healthy band for a SKU.

Lesson 2 of 4 Practice 9 min

Top-up ordering

When stock hits the minimum, a min/max policy reorders enough to bring you back up to the maximum. The order quantity is simply the maximum minus current on-hand.

Top-up ordering matters because it removes guesswork from order size — you do not pick a number, the gap to the ceiling decides it. This keeps orders right-sized and stock in the band.

With max 200 and on-hand at the min of 50, the system orders 200 − 50 = 150 units to refill to the ceiling. If on-hand had drifted to 30, it would order 170. The order always closes the gap to max, so you never under-order a top-up or accidentally blow past the ceiling.

Key takeaways

At minimum, reorder up to the maximum.
Order quantity = maximum − current on-hand.
Top-up removes guesswork from order size.
Example: max 200 − on-hand 50 = order 150 units.

Lesson 3 of 4 Reading 9 min

Setting the levels

Set the minimum from demand during lead time plus a safety buffer (so you do not run out while waiting), and the maximum from how much you can sell before stock ages plus storage limits. The two are derived, not guessed.

Setting them well matters because a min set too low stocks you out and one set too high wastes the buffer; a max set too high freezes cash and one too low triggers constant tiny orders.

If a SKU sells 10/day with a 5-day lead time, demand-in-lead-time is 50, so a min around 60–70 (with buffer) is sensible. A max of 200 gives about 3 weeks of cover — enough to avoid frequent ordering without holding months of stock. Derive both from real demand and lead time, not habit.

Key takeaways

Min = lead-time demand + safety buffer.
Max = sellable-before-aging plus storage limits.
Both are derived from demand and lead time, not guessed.
Example: 10/day, 5-day lead time → min ~60–70, max ~200.

Lesson 4 of 4 Reading 9 min

Tuning the levels

Min/max levels are not permanent. As demand rises or falls, or lead times change, the levels need adjusting so the band still matches reality and orders stay right-sized.

Tuning matters because stale levels quietly misbehave — a min left too low after demand grows causes repeated stockouts, and a max left too high after demand falls keeps refilling to a ceiling you no longer need.

If a SKU’s demand doubles from 10 to 20/day but the min stays 60, you now stock out mid-cycle; raising min toward 120 and max toward 350 restores the buffer. A quarterly review of fast-moving SKUs against recent sales keeps the bands honest instead of letting last year’s numbers run this year’s orders.

Key takeaways

Min/max levels are not permanent.
Adjust them as demand and lead times change.
Stale levels cause stockouts or needless refills.
Example: demand doubling 10→20/day needs min/max raised too.

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Min/Max Stock Policies

What you’ll learn

Course content

Minimum and maximum levels

Top-up ordering

Setting the levels

Tuning the levels

Finished the material?

More in this path

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Warehouse & Locations

Units of Measure & Conversions

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