Right first time is the the quality objective of completing each unit correctly on its first pass without rework, retest, or correction - it is a direct indicator of process capability, flow efficiency, and operational discipline.

What Is Right first time?

• Definition: RFT measures percentage of units that pass all required steps with no interruptions.
• Difference from Final Yield: Final yield can hide recovery loops, while RFT reveals true process quality.
• Key Drivers: Standard work quality, process stability, poka-yoke coverage, and clear specifications.
• Operational Impact: High RFT correlates with low WIP, short cycle time, and predictable output.

Why Right first time Matters

• Throughput Efficiency: Correct-first-pass production maximizes available capacity.
• Cost Reduction: Avoiding rework eliminates duplicate labor and test expense.
• Schedule Reliability: Fewer rework loops reduce planning volatility and expedite pressure.
• Quality Confidence: Consistent first-pass conformance lowers escape risk.
• Lean Foundation: RFT is a prerequisite for stable flow and pull-based operations.

How It Is Used in Practice

• Step-Level Tracking: Measure RFT by station, product, and shift to expose localized loss points.
• Root-Cause Elimination: Address recurring first-pass failures with standardized corrective-action discipline.
• Prevention Reinforcement: Use training, setup verification, and error-proofing to sustain improvements.

Right first time is the clearest expression of operational quality maturity - when work is done correctly once, cost, speed, and reliability all improve together.