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Repeat production · Blanket orders · Procurement planning

CNC Machining Batch Size & Release Economics Planner

Compare up to three release structures using your own annual demand, recurring unit price, setup, logistics, tooling, safety stock, and inventory-carrying assumptions.

Updated July 23, 2026Interactive worksheetBy Procut-CNC Engineering
Compare release plans

Annual volume by itself does not determine a production price. Two programs with the same annual demand can have very different economics when one uses twelve small releases and the other uses four larger batches. The comparison below separates recurring production cost, release-level cost, cycle-stock carrying cost, safety stock, and one-time program investment.

Use the same technical baseline in every scenario. Keep drawing revision, material, finish, inspection, documentation, delivery location, and quality requirements constant. A lower calculated total is not meaningful if the scope changed.
Private by design: worksheet entries stay in this browser page. They are not saved, transmitted, or added to analytics. Do not enter controlled technical data, part numbers, customer names, or another supplier's confidential quote.

Your common demand assumptions

Build comparable release scenarios

Scenario A

Release structure A

Complete every field; use 0 when a cost does not apply.
Calculated batch size
— units
Average inventory proxy
— units
Annual release cost
—
Annual carrying cost
—
First-year entered total
—
First-year effective unit
—
Ongoing entered annual total
—
Ongoing effective unit
—
Scenario B

Release structure B

Complete every field; use 0 when a cost does not apply.
Calculated batch size
— units
Average inventory proxy
— units
Annual release cost
—
Annual carrying cost
—
First-year entered total
—
First-year effective unit
—
Ongoing entered annual total
—
Ongoing effective unit
—
Scenario C

Release structure C

Complete every field; use 0 when a cost does not apply.
Calculated batch size
— units
Average inventory proxy
— units
Annual release cost
—
Annual carrying cost
—
First-year entered total
—
First-year effective unit
—
Ongoing entered annual total
—
Ongoing effective unit
—
Comparison status 0 of 3 scenarios ready — complete at least two to compare.
Lowest entered first-year total —
Lowest entered ongoing annual total —

What the planner calculates

For each scenario, calculated batch size equals annual demand divided by releases per year. Average cycle stock is modeled as one-half of that batch, then added safety stock is included. Annual carrying cost uses the recurring unit price as the inventory-value proxy and applies the carrying rate you enter.

Entered total is not a supplier quote. It includes only the fields shown here. It does not determine manufacturability, capacity, lead time, scrap, material escalation, outside-processing risk, taxes, financing, obsolescence, cancellation exposure, or contract terms.

Questions to settle before choosing a batch size

Demand and inventory

  • Which demand is firm, forecast, cancelable, or upside only?
  • Who owns raw material, WIP, finished goods, and obsolete inventory?
  • What safety stock is actually approved, and where will it be held?
  • What shelf-life, revision, corrosion, packaging, or traceability limits apply?

Release and capacity

  • What minimum release supports the quoted setup and inspection plan?
  • When does lead time begin, and which buyer inputs start the clock?
  • What forecast window is visible and what portion is firm?
  • What happens when releases move, demand changes, or a revision supersedes inventory?

Turn the comparison into a quoteable program

Send the released model and drawing, annual demand, candidate release quantities, cadence, firm window, required delivery, inventory expectations, and quality flow-downs. Procut-CNC will review process fit, setup recurrence, material, tooling, inspection, outside processing, capacity, and commercial boundaries before proposing a program.

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