PROCESS CAPABILITY: Explaining Cp, Cpk, Pp, Ppk and HOW TO INTERPRET THOSE RESULTS

Process Capability is an important topic in continuous improvement and quality engineering and in this video, we discuss the basics of process capability, the major indices (Cp, Cpk, Pp, Ppk) and how to interpret those results!


0:50 – An Introduction to Process Capability – Comparing our process against our specifications


2:22 – The Cp Index – measuring the “potential” of your process


4:50 – The Cpk Index – A worked example and Explanation of the equation


6:40 – The Cpk Index – Centering up our process and re-calculating Cpk.


7:35 – The Pp index – Explaining the 2 different methods for calculating the standard deviation, and a discussion around process control


11:20 – The Ppk Index – Looking at the equation, and discussing the standard deviation (again)

11:55 – Interpreting the Results of your Capability Value – the sigma level, % Conforming, DPM (Defects Per Million) and Defect Rate (1 in 10,000??)

Standard Deviation Video:
Control Charts Video:


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Hiwa Javanmiri : I passed the CQE exam by using most of your videos last week. Today, when I watch your video again, still I learn and still is great. Thank you ANDY
rezgui imen : Thank you very much for this video, you have said it all.
I need some clarifications please,
1.we manufacture several batches per year on the same machine, and we are arranged with each batch to make a new adjustment, how I can control the performance of the machine, with what parameter Cp/CpK or Pp/Ppk? Knowing that the batches are manufactured in slightly different periods
2. we have parameters that are not at the upper or lower specification limit, how can we control the capability
jitendra nath : Hello, thanks for this video. but I have doubt regrading last chart in which you have shown Cpk and sigma level,DPMO and defect rate. As per my understanding DPMO of six sigma is 3.4 but you have mentioned it 0.002. Please clear my doubt.
thanks
Michael Sumido : Hi sir, thanks for the great explanation. I only cant comprehend why the mean of 6 when centering the process in CPk becomes 8. Can you please highlighten me. Thank you very much.
Mark Joseph Lobete : Hi, excellent video especially the interpretation of result of Cpk, but I wanna know: are Cpk numbers such as 1.67 and 2.00 are defined already in industry? Thanks for the answer

Process Capability Part I - Cp

In this video we have covered Process Capability Ratio Cp. It is an important measure of a process' performance against the specifications provided by customer. We have also discussed what a capable process is, and how Cp varies as we increase or decrease the standard deviation of a process.

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Cpk - Capability Statistics explained

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#Lean Six Sigma
#Six Sigma
hawker79 : Hands down the best, most concise video I've seen on the subject. Fantastic!!
Lean Six Sigma Training Ltd : Great presentation Paul. Cpk and Ppk great way to measure capability and performance but is not used enough by companies because they don't understand it. You show how simple and intuitive it really is ! I just bought your new book on Amazon...looking forward to reading it and writing a review.
Truth Seeker : Mr. Paul, This is one of my favorite lecture so far, it was the pathway to underrating many other things! Can you please provide a trusted link to Cpk-Sigma Limits Conversion Table! to help me find out my sigma results!
Jeffrey Palma : Things goes easy when you explain it. I'm sure your channel will grow cause you always clarify things in a simplest way.
Norris Forbes : Great presentation very clearly and simply explained, loved to hear your explanation on the difference between PP, PPk and CP, CPK.

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