First Pass Yield (FPY) is a key performance indicator in manufacturing and production that measures the efficiency and effectiveness of a process in producing products correctly without any rework or defects on the first attempt. It is also known as First Time Yield (FTY). A high FPY indicates that the process is well-controlled and produces a high percentage of defect-free products on the first try, leading to reduced costs and improved customer satisfaction.

The formula for calculating FPY is:

For example, if a production line processes 1,000 units and 950 of them are defect-free on the first pass without needing any rework, the FPY would be:

FPY is an important metric because it highlights the effectiveness of the production process in minimizing waste, reducing rework and associated costs, and ensuring product quality. By focusing on improving FPY, organizations can enhance operational efficiency and increase overall productivity.