What is First Pass Yield (FPY)?
The percentage of units or tasks completed correctly the first time without requiring rework, repair, or correction.
Detailed Explanation
First Pass Yield measures the proportion of work that passes through a process step or entire process without any defects, errors, or rework. It is calculated as the number of good units produced divided by the total number of units started, expressed as a percentage. FPY is a powerful quality metric because rework is one of the most significant hidden costs in any business — it consumes time, materials, and capacity that could be used for new productive work. Low FPY indicates process problems, training gaps, unclear specifications, or inadequate quality checks. Improving FPY has a direct impact on profitability and throughput.
Why It Matters
Rework is the silent profit killer. A business with 80% first pass yield is effectively doing 20% of its work twice, which means paying for labour and materials twice. Improving FPY directly increases capacity and profitability without adding resources.
Example
A signage manufacturer measures their FPY across the production process and discovers it is only 75% — one in four signs requires some form of rework. Root cause analysis reveals that 60% of rework is caused by incomplete or ambiguous design briefs from the sales team. Implementing a standardised design brief template with mandatory fields increases FPY to 92%.
Related Terms
The process of inspecting and testing products or services to ensure they meet defined quality standards.
A data-driven methodology for eliminating defects and reducing variation in business processes to achieve near-perfect quality.
The rate at which a system or process produces output over a given period of time.
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