Other technical articles on die casting by Bob McClinticĮ-mail: Bob McClintic and Associates: 2017 Second, by training your personnel in the use of the tools and methodology.Ĭlick the following for information on consulting and training services offered by McClintic & Associates.
How to calculate ppm of exposed gas how to#
If you would like to learn how to reduce your PPM while increasing profits I can help.įirst by demonstrating a systematic and scientific approach to design and manufacturing in your facility.
If you don't measure it you can not control it. It is the result of careful planning, design, and execution. Quality can not be inspected in after the fact. We can now control the process in order to control the quality. The monitoring and measurement systems we have today have paved the way for improved quality. Insanity is doing things the same way we've always done them and expecting different results. Impossible? Yes if you are still using the same manufacturing methods which were responsible for the 5 or 10% scrap you used to accept.Ī friend of mine had the following quotation on his wall: For example, if a group of people breathed a concentration of 100 milligrams of sarin per cubic meter of air for one minute, this would be a lethal dose for 50 of the group. Way, one bad part per day! Notice I did not say one bad part per day per This means that the milligrams of sarin per cubic meter of air, are multiplied by the number of minutes of exposure, in order to calculate an individuals dose. That means that you would be allowed 25 pieces for everyġ,000,000 pieces or 250 defective parts per year. Let's assume your customers requirementsĪre 25 PPM. Like most companies, your plant operates around 5 days a week, 50 weeks The value of the blank cell will be calculated. Therefore, at least three cells must have values, and no more than one cell may be blank. Enter appropriate values in all cells except the one you wish to calculate. Each calculator cell shown below corresponds to a term in the formula presented above. Say, you produce 10,000,000 parts per year for your customer. Dilution calculator - ppb, ppm, ppt, pph. To calculate: For example, let's say you had 25 pieces defective in a shipment of 1,000 pieces. Now the rate for most automotive components is targeted at 25 PPM or 0.0025%
There was a time when you were considered a pretty good supplier when your defect rate was less than 1%, (10,000 PPM), then the expectation was increased to 0.1% or 1,000 PPM. PPM (Parts per million) is a measurement used today by many customers to measure quality performance.ĭefinition: One PPM means one (defect or event) in a million or 1/1,000,000