Attribution analysis
3.1 The estimated feature
① Set-up item to check the thread position
→There is a possibility.
Reason:There is the first thread at the top of inner diameter section.
② In process NG parts
→There is not a possibility.
Reason:We had a disposal recorded.
③ Jumped the process
→ A possibility is very low.
Reason:There is the first thread at the top of inner diameter section. If the NG item is jumped the process, there is not first thread at the top of inner diameter section.