Form-dependent position prevention control

The AIAG-VDA 1st ed. FMEA manual lists "form-dependent position" as a production process prevention control (p. 104). Can anyone explain what this is referring to?

This is a guess because I have not heard it expressed that way. It may refer to the use of asymmetrical features to prevent a part from being assembled in any but the correct orientation.

Miner said:

This is a guess because I have not heard it expressed that way. It may refer to the use of asymmetrical features to prevent a part from being assembled in any but the correct orientation.

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Than, is it different to Poka-yoke design?

No. Error proofing (Poke-Yoke) includes asymmetric features (aka “keying”) to control insertion/mating of parts.

Poka-yoke can be implemented at three levels:

1. Cannot make (prevention)
2. Cannot cycle (detection)
3. Cannot accept or pass (detection)

Level 1 is usually achieved through design such as the use of asymmetrical features to prevent a part from being assembled in any but the correct orientation. If by "Poke-yoke design", you meant the same as level 1 then they are the same.

Levels 2 & 3 are usually achieved by adding sensors or physical elements to the process.

When I first learned about Poka-yoke, a distinction was made that level 1 was called Error-proofing while levels 2 & 3 were called Mistake-proofing, but that distinction seems to have been lost over the years.

i think that example is a part of poka-yoke like coding in connectors, or else- maybe more to production process rather than desighn itself. It's just confuse with previous example of prevention control where it is mentionrd that PY strictly. But it is the same field.

It could also be an automated process feed or conveyor chute that positions a part (based on it’s form or shape) for the next operation such as laser marking, assembly welding, filling (such as with a lateral flow test device), etc. I’ve seen plenty of these. It could still also be a ‘keyed’ or asymmetrical part that is inserted or otherwise attached to another part. Either way it still a poke yoke control.the list provided above is not clear or mutually exclusive and certainly not exhaustive. @AndrewK you should add the reference citation as to author and title at a minimum…

Bev D said:

It could also be an automated process feed or conveyor chute that positions a part (based on it’s form or shape) for the next operation such as laser marking, assembly welding, filling (such as with a lateral flow test device), etc. I’ve seen plenty of these. It could still also be a ‘keyed’ or asymmetrical part that is inserted or otherwise attached to another part. Either way it still a poke yoke control.the list provided above is not clear or mutually exclusive and certainly not exhaustive. @AndrewK you should add the reference citation as to author and title at a minimum…

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Sure! But original post is not editable anymore... that is a same page on which is reffering author.
AIAG-VDA manual

Thank you for explanations, but tell me, how it is possible, that manual is using wording, which needs additional explanation?
How, not native English speaker can understand and implement such vague guidelines ?

Well native English speaking can’t’ interpret it either. Many standards are written in vague languages or at least esoteric words that are nto commonly understood. It is the way it is.