Measure quality with definitions that stay consistent from shift to shift.
Calculate first-pass yield, rolled throughput yield, defect rates, scrap, rework, Cp, Cpk and cost of poor quality — with guides on interpretation, assumptions and data discipline.
Useful numbers, visible assumptions
These tools are built for early-stage planning and operational review. You supply the rates, quantities, periods and performance assumptions that belong to your situation; the site shows the arithmetic and explains what can change the result.
Popular calculators
First-Pass Yield Calculator
Calculate the percentage of input units that pass a process without rework.
Open →Rolled Throughput Yield Calculator
Combine first-pass yield percentages across sequential process steps.
Open →Defect Rate Calculator
Calculate defects per unit and a percentage-style defect rate from entered counts.
Open →Scrap Rate Calculator
Calculate scrap as a percentage of units started.
Open →Rework Rate Calculator
Calculate the percentage of units requiring rework.
Open →Cp Process Capability Calculator
Calculate Cp from upper/lower specification limits and an entered process standard deviation.
Open →Practical guides
Define Quality Metrics Before Measuring Them
A practical framework for define quality metrics before measuring them, including the data to collect, assumptions to document, comparisons to make and limits to recognize.
Open →First-Pass Yield Explained
A practical framework for first-pass yield explained, including the data to collect, assumptions to document, comparisons to make and limits to recognize.
Open →Rolled Throughput Yield Explained
A practical framework for rolled throughput yield explained, including the data to collect, assumptions to document, comparisons to make and limits to recognize.
Open →Defects vs Defective Units
A practical framework for defects vs defective units, including the data to collect, assumptions to document, comparisons to make and limits to recognize.
Open →Scrap Rate and Scrap Cost
A practical framework for scrap rate and scrap cost, including the data to collect, assumptions to document, comparisons to make and limits to recognize.
Open →Rework Rate and Rework Burden
A practical framework for rework rate and rework burden, including the data to collect, assumptions to document, comparisons to make and limits to recognize.
Open →Built for international use
Most tools avoid hard-coding currency, utility rates, labour rates, legal thresholds or regional benchmarks. Use consistent units and the rates that apply where you operate.
Editorial approach
We favour primary government, standards and technical sources for definitions and safety boundaries.
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