Poka-Yoke in Process FMEA (PFMEA) - Which column?

[Jim123]

In which column you describe Poka Yoke, if prevention is based on a detection of failure cause? Both in the prevention column or detection in detetction and prevention in prevention column?

Thanks
Jim

 

[Miner]

In which column you describe Poka Yoke, if prevention is based on a detection of failure cause? Both in the prevention column or detection in detetction and prevention in prevention column?

Thanks
Jim

It depends on the type of Poka Yoke. One type prevents the defect from being made. This would be Prevention. The other types either provide warning that the defect occurred in-station, or prevent the defect from being accepted at the next station. These are detection.

 

[Jim123]

Isn't each Poka Yoke an prevention based on detection?
Where can I find the real definition of poka yoke?

regards Jim

 

[Jim Wynne]

Isn't each Poka Yoke an prevention based on detection?
Where can I find the real definition of poka yoke?

regards Jim

My advice: just dump the term Poka Yoke, say "mistake proofing" and explain what you're doing. If you're preventing something, the control goes in the "prevention" column. If you're trying to detect something, put it in the "detection" field.

 

[Miner]

Isn't each Poka Yoke an prevention based on detection?
Where can I find the real definition of poka yoke?

regards Jim

I recommend the book "Poka Yoke" by Shigeo Shingo. It contains many examples with sketches and photos.

This link also gives a concise work instruction on the topic.
http://www.isixsigma.com/library/content/c020828a.asp

Section 4b discusses prevention-type Mistake Proofing, and section 5 discusses the detection-type. Process-design Poka Yoke is typically called Mistake Proofing. This can be either prevention or detection.

Component-design Poka Yoke is usually called Error Proofing. This is designing a component such that you cannot assemble it incorrectly (e.g., part is symmetrical such that there is no backwards, upside-down etc., or part has a unique feature that prevents incorrect assembly). This is true prevention.

 

[Helmut Jilling]

My advice: just dump the term Poka Yoke, say "mistake proofing" and explain what you're doing. If you're preventing something, the control goes in the "prevention" column. If you're trying to detect something, put it in the "detection" field.

I agree. Don't overthink the label. The important thing is that you have implemented the "Poka-Yoked, error-proofed, mistake-prevented, idiot-proofed" methodology.

If you would like, you may use my trademarked acronym - PYEPMPIdP, which can be pronounced "peptic ulcer" for short.

 

[Jim123]

If the poka yoke installed, do you discuss the solution in the function column?
Is that a new functionality?

Thanks, Jim.

 

[Jim Wynne]

If the poka yoke installed, do you discuss the solution in the function column?
Is that a new functionality?

Thanks, Jim.

There isn't enough information here to answer your question; is the poka yoke an inspection device? A weld fixture? A special type of packaging? Is it cited as an independent operation on the flow diagram? If so, it should also be considered a separate "function" on the PFMEA. If it's an inspection fixture, it might belong in the "Current Process Controls" column, or if it's an addition to an existing process, it might be properly cited on the righthand side of the form as an improvement action. Do what makes sense.

 

[sushant_kulkarni]

Any type of poka yoke comes under current process prevention only

 

[sushant_kulkarni]

iam strongly disagreed about that, poka yoke are coming under prevevtions only.

Tell me if i am wrong.