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Production Run Time

Estimate shots and scheduled press hours for a good-part order after yield and runtime-efficiency losses.

Example starting values are prefilled to demonstrate the calculation. Replace them with your measured, quoted, or job-specific inputs before relying on a result.

Inputs

Inputs

Range: at least 1 parts

Enter a whole-number count; decimal values are rejected during calculation.

Range: at least 1 cavities

Enter a whole-number count; decimal values are rejected during calculation.

Range: at least 0.001 s

Use a measured steady-state full cycle time in seconds, not just cooling or screw-recovery time.

Range: 0.001–100 %

Productive molding run time ÷ scheduled run time, entered as a percent above 0 and up to 100. Exclude setup unless your plant's scheduled-time definition includes it.

Range: 0.0–100 %

Expected accepted parts ÷ attempted parts, entered as a percent above 0 and up to 100. This is distinct from runtime efficiency and should come from relevant process or order history.

Result

Attempted parts from full shots (parts)
10,208
Runtime allowance from entered efficiency (h)
3.753
Expected good parts at entered yield (parts)
10,003.84
Ideal molding time (h)
21.267
Required full shots (shots)
2,552
Production Run Time (h)
25.020
Planning assumptions and limits
The shot count is rounded up to a whole cycle. Expected good parts are a statistical expectation from the entered overall yield, not a guaranteed count; actual rejects may vary by cavity and over time. Runtime efficiency is applied separately to ideal molding hours. Setup and startup shots are excluded and should be planned separately.

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