Min/Max and Safety Stock for Fasteners
Min-max sets a reorder point (min) and an order-up-to level (max). Safety stock protects against variation in demand and lead time.
Formulas
| Term | Formula |
|---|---|
| Reorder point (min) | Average daily usage x lead time (days) + safety stock |
| Safety stock | Service factor (z) x demand standard deviation x square root of lead time |
| Max | Min + order quantity |
These tables carry the same figures as the printed sheet below.
The printed sheet
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Text version of this sheet
Min-max and safety stock for fasteners
What it is
AT A GLANCE
MAX
Min-max sets a reorder point (min) and an order-up-to level (max). Safety stock protects against
variation in demand and lead time.
MIN
Set levels from real usage
Formulas
Term
Formula
Reorder point (min)
Average daily usage x lead time (days) + safety stock
Safety stock
Service factor (z) x demand standard deviation x square root of lead time
Max
Min + order quantity
Key points
Review levels quarterly; usage changes and engineering changes make old levels wrong.
Governing standards: Inventory management practice. Editions shown are the latest confirmed as of September 2026. The drawing and the governing standard always take
precedence over this sheet.
torquing any fastener. Verify the current governing standard, project documents, OEM requirements, size, thread, coating and lot certification. To the fullest extent permitted by law, The Fastener App disclaims liability
arising from reliance on this reference.
Fastener Guide reference FG-DC73A8 · thefastenerapp.com/fastener-guide/inventory-vmi/min-max-and-safety-stock-for-fasteners · © The Fastener App. Reference only — verify the current governing standard, drawing and manufacturer data before specifying or installing.
