Parts Per Shift Calculator

Estimate good parts per shift from cycle time, cavities, uptime, and scrap rate. Use this as a documented planning estimate, then validate it against the actual machine, mold, resin, and process.

Formula and method

Good output = available seconds / cycle x cavities x uptime x yield.

Use the actual paid/run time definition and a stable, comparable scrap rule.

Inputs and units

Use controlled records, CAD, measured production data, the exact resin data sheet, or machine-maker specifications. Keep the material and time basis with the result.

Worked example

480 min, 30 s, four cavities, 90% uptime, 3% scrap = 3,352 good parts.

What the result supports

This result is a first-pass screen for production planning. Use it to identify the next record or engineering check, not as a release decision.

Sanity check

Check the unit basis and whether all quantities describe the same cavity, shot, machine, or production window before comparing values.

Important limitation

Do not use this as a staffing or delivery commitment without validated downtime data.

Reference: ARBURG: cycle-time optimisation.

Next calculation

OEE Capacity Calculator

FAQ

What must be checked after using parts per shift calculator?

Retain the input source and compare this estimate with the applicable machine, mold, supplier, or production record before relying on it.