How do you calculate production order release quantity?

Divide net demand by the expected yield, then multiply by your lot-size rounding factor. For 980 units of demand at 0.94 yield and a 1.05 rounding factor, release = 980 / 0.94 x 1.05 = about 1,095 units.

Why divide demand by yield instead of multiplying?

Because yield is the fraction of starts that come out good. To find how many to start, you invert it: dividing 980 by 0.94 gives 1,042.55 starts needed before any rounding, so that 94% of them yields your 980 good parts.

What is the lot-size rounding factor for?

It nudges the quantity to satisfy minimum lot, batch, or packaging rules. The 1.05 factor lifts the yield-adjusted 1,042.55 to about 1,095 units, which is what you'd actually release to hit a lot multiple.

What yield divisor should I use?

Use the expected good-part fraction for the process, drawn from recent first-pass yield history. A 0.94 divisor means you expect 6% fallout. Pull the number from actual data rather than a hopeful target.

What happens if I release exactly the net demand?

You finish short. Releasing 980 against a 94% yield nets only about 921 good parts, leaving a 59-unit gap that forces a re-run. Inflating to about 1,095 starts is what protects the 980-unit commitment.

Does this replace MRP lot sizing?

No, it complements it. MRP nets demand; this calculator scales that net demand for yield and rounds it to a releasable lot. You still apply your MRP lot-sizing policy, here represented by the rounding factor.

ERP & MRP Planning calculator

Production Order Release Quantity Calculator

Production order release quantity is the number of units you actually start on the floor so that, after scrap and yield loss, you finish enough good parts to cover net demand. Production planners and MRP schedulers calculate it because releasing exactly the demand quantity guarantees a shortfall once normal fallout happens. It matters on any process with measurable yield loss or minimum lot rules: release too little and you re-run a partial order; release too much and you tie up material and capacity. This calculator inflates net demand by your expected yield and a lot-size rounding factor to get the right start quantity.

What this calculator does

Estimate production order release quantity from net demand, expected yield, and lot-size rounding factor.
a planner needs to release the right production quantity into the shop
It computes the start quantity to release by dividing net demand by the expected yield and applying a lot-size rounding factor.

Formula used

Release quantity = net demand to cover ÷ expected yield divisor × lot-size rounding factor

Inputs explained

Net demand to cover:
Expected yield divisor:
Lot-size rounding factor:

How to use the result

Use it at order release, after MRP nets demand against stock, on any process where yield loss or lot-size rules apply.
It uses a single average yield; if yield varies batch to batch or the process has a fixed minimum loss rather than a percentage, the divisor alone won't capture it.

Current U.S. benchmarks

Manufacturing hourly earnings average $30.27 (BLS, Jun 2026), up 4.4% from a year earlier. Median machinist pay is $28.24/hr (OEWS 2025), with state medians on each state page. Manufacturers have 529k open positions nationally (BLS JOLTS).
U.S. manufacturing runs at 75.6% of capacity (Federal Reserve, May 2026). New factory orders are up 2.3% year over year (Census).

Common questions

How do you calculate production order release quantity? Divide net demand by the expected yield, then multiply by your lot-size rounding factor. For 980 units of demand at 0.94 yield and a 1.05 rounding factor, release = 980 / 0.94 x 1.05 = about 1,095 units.
Why divide demand by yield instead of multiplying? Because yield is the fraction of starts that come out good. To find how many to start, you invert it: dividing 980 by 0.94 gives 1,042.55 starts needed before any rounding, so that 94% of them yields your 980 good parts.
What is the lot-size rounding factor for? It nudges the quantity to satisfy minimum lot, batch, or packaging rules. The 1.05 factor lifts the yield-adjusted 1,042.55 to about 1,095 units, which is what you'd actually release to hit a lot multiple.
What yield divisor should I use? Use the expected good-part fraction for the process, drawn from recent first-pass yield history. A 0.94 divisor means you expect 6% fallout. Pull the number from actual data rather than a hopeful target.
What happens if I release exactly the net demand? You finish short. Releasing 980 against a 94% yield nets only about 921 good parts, leaving a 59-unit gap that forces a re-run. Inflating to about 1,095 starts is what protects the 980-unit commitment.

Last reviewed 2026-05-12.