What is PPM and How do I calculate it?
To calculate: For example, let's say you had 25 pieces defective in a shipment of 1,000 pieces. 25/1000= .025 or % defective. .025 X 1,000,000 = 25,000 PPM. Let's put it in perspective. Let's say, you produce 10,000,000 parts per year for your customer. If you're like most companies, your plant operates around 5 days a week, 50 weeks per ...