First pass yield

good the first time, without rework

FPY = units passed first time / units entering the process

First pass yield is the share of units that pass a process step at the first attempt, with no rework or repair. Rework hides inside a normal “yield”, FPY shows it.

Example

1,000 units enter the step, 950 pass at once, 30 are reworked and 20 scrapped. The yield counts 980 good parts, the FPY is 95 %.

Calculate it

First Pass Yield (FPY) Calculator: FPY per process, rolled throughput yield, trend and top defects.

Related terms

• Rolled throughput yield: chance of passing all steps first time
• COPQ: cost of poor quality
• OEE: overall equipment effectiveness