How do you calculate the required buffer?

Multiply daily usage by the replenishment lead time for cycle stock, then apply the safety cushion. Here 350 units a day across 30 days is 10,500 units, and the 1.1 safety multiplier brings it to 11,550 units.

What is the difference between cycle stock and the required buffer?

Cycle stock is what the 30-day lead time consumes on its own: 10,500 units. The required buffer adds the safety cushion on top, 11,550 units here, so a normal run of demand does not empty the shelf before replenishment lands.

What is a good inventory turns figure for a scrap yard?

Cycle stock is 10,500 units across the 30-day lead time, and the 1.1 safety multiplier brings the required position to 11,550 units. Compare that against stock on hand plus anything already on order to see whether the next cycle is covered.

How do daily usage and lead time affect required inventory?

Required inventory is cycle stock, daily usage times lead time, plus safety stock. Higher usage or longer lead time both raise the inventory you must hold to avoid starving the line, which is why volatile feeds need fatter buffers.

Why size safety stock separately?

Cycle stock covers expected demand over the lead time; safety stock absorbs the variability around it. Without that buffer, any spike in processing or delay in inbound scrap pushes you below the line and idles equipment.

How do I lower the cash tied up in yard inventory?

Shorten supplier lead time, tighten safety stock as your feed becomes more predictable, and reorder more frequently in smaller lots. Each reduces the cycle and safety stock you must carry, raising turns without raising stockout risk.

Metal Recycling, Scrap Processing & Salvage calculator

Yard inventory turns Calculator

Yard managers, buyers, and operations planners use it to set reorder points, justify safety stock, and balance working capital tied up in piles against the risk of a line running dry. Misjudge it and you either stall production or bury cash in inventory that turns too slowly.

What this calculator does

Estimate yard inventory turns for metal recycling, scrap processing and salvage using production-ready inputs so teams can plan replenishment and safety stock using actual usage and lead time.
Use it when yard inventory turns in metal recycling, scrap processing and salvage is being sized for a buffer or safety stock review.
It sizes the stock a replenishment cycle requires: daily usage across the lead time, then the safety cushion on top. Here that is 10,500 units of cycle stock and 11,550 units required in total.

Formula used

Yard inventory turns cycle stock = yard inventory turns daily usage × yard inventory turns lead time
Required yard inventory turns inventory = cycle stock + yard inventory turns safety stock

Inputs explained

Daily yard throughput: Use recent consumption, demand history, service usage, production schedule, or MRP issue rate.
Replenishment lead time: Enter supplier, internal replenishment, repair, transit, or planning lead time.
Safety stock multiplier: Add buffer for demand variation, supplier risk, quality holds, downtime, or service-level requirements.

How to use the result

Use it when setting reorder points for a grade of scrap, evaluating whether current piles cover the supplier lead time, or sizing safety stock for a volatile feed.
It assumes steady daily usage and a fixed lead time, real scrap inflows and processing rates swing, so treat the days-of-supply figure as a planning baseline, not a guarantee against a supply shock.

Current U.S. benchmarks

The producer price index for steel mill products stands at 374.203 (BLS, Jul 2026), up 22.5% from a year earlier. Quotes priced off last quarter's material cost miss this move.
U.S. iron and steel imports ran $2.2B in Jun 2026 (Census International Trade). The U.S. ran a trade deficit of $0.4B in the category that month. Import volumes are the pressure gauge behind tariff and reshoring decisions.

Common questions

How do you calculate the required buffer? Multiply daily usage by the replenishment lead time for cycle stock, then apply the safety cushion. Here 350 units a day across 30 days is 10,500 units, and the 1.1 safety multiplier brings it to 11,550 units.
What is the difference between cycle stock and the required buffer? Cycle stock is what the 30-day lead time consumes on its own: 10,500 units. The required buffer adds the safety cushion on top, 11,550 units here, so a normal run of demand does not empty the shelf before replenishment lands.
What is a good inventory turns figure for a scrap yard? Cycle stock is 10,500 units across the 30-day lead time, and the 1.1 safety multiplier brings the required position to 11,550 units. Compare that against stock on hand plus anything already on order to see whether the next cycle is covered.
How do daily usage and lead time affect required inventory? Required inventory is cycle stock, daily usage times lead time, plus safety stock. Higher usage or longer lead time both raise the inventory you must hold to avoid starving the line, which is why volatile feeds need fatter buffers.
Why size safety stock separately? Cycle stock covers expected demand over the lead time; safety stock absorbs the variability around it. Without that buffer, any spike in processing or delay in inbound scrap pushes you below the line and idles equipment.

Last reviewed 2026-08-13.