![]() To get from the sigma level to an approximate PPM in Excel, you use this formula: a Cpk of 1.67 equates to a 5 sigma process.) It’s easy to see from the table that the “sigma level” is 3 times the capability index (e.g. To approximate the PPM for your specific Cpk level, you can shift over to Microsoft Excel. Using this table, we can see that a Cpk (or Ppk) of 1.33 equates to a +/-4 sigma process which yield approximately 63 defects per million parts produced. ![]() One of the most common questions I get from students in my Process Capability Class is, how can I use the capability index from my process to approximate a defect level for my process?įor most, the answer comes from using a table like this one: Root Cause Analysis and the 8D Corrective Action Process course.An Introduction to Reliability Engineering. ![]() Reliability Analysis Methods online course.14 Ways to Acquire Reliability Engineering Knowledge.Reliability Engineering Management DRAFT.Innovative Thinking in Reliability and Durability.Equipment Risk and Reliability in Downhole Applications.Musings on Reliability and Maintenance Topics. ![]()
0 Comments
Leave a Reply. |