Explain unit ppm with example.
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PPM (Parts per million) is a measurement used today by many customers to measure quality performance.
Definition: One PPM means one (defect or event) in a million or 1/1,000,000
To calculate: For example, let's say you had 25 pieces defective in a shipment of 1,000 pieces. 25/1000= .025 or 2.5% 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 year or 250 days a year. Let's assume your customers requirements are 25 PPM. That means that you would be allowed 25 pieces for every 1,000,000 pieces or 250 defective parts per year.
Definition: One PPM means one (defect or event) in a million or 1/1,000,000
To calculate: For example, let's say you had 25 pieces defective in a shipment of 1,000 pieces. 25/1000= .025 or 2.5% 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 year or 250 days a year. Let's assume your customers requirements are 25 PPM. That means that you would be allowed 25 pieces for every 1,000,000 pieces or 250 defective parts per year.
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