Tag Archives: control charts

Cleanrooms, Classes, and Control Charts

Question My question has to do with cleanroom monitoring, specifically particle counts. Using ISO 14644-1: 1999, (we are still transitioning to the new standard). We have 27 test sites in our cleanroom. Our Particle Counter takes 10 readings per minute … Continue reading

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Control Chart to Analyze Customer Satisfaction Data

Q: Let’s assume we have a process that is under control and we want to monitor a number of key quality characteristics expressed through small subjective scales, such as: excellent, very good, good, acceptable, poor and awful. This kind of data is … Continue reading

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