J
JRKH
I know I know. It seems we beat this one to death, but I am trying to put together acceptable verbage to clear a NC from our last audit. We use tape measures for measuring to +/-.06 and up to 8 feet or more. Since most items are checked multiple times during the production cycle using different tapes I do not see a need for a heavy duty recall system for our tapes. The verbage I have come up with is listed below.
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Tape measures used by production personnel are verified during production by one or more of the following methods.
1) Checking the same measurement with another tape measure.
2) Checking the same measurement with another, more precise instrument.
3) Verified by checks at subsequent manufacturing operations.
4) Checked against a steel rule
Tape measures used by Quality Control personnel are verified at least monthly against a steel rule maintained for this purpose .
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What does the group think, will this fly?
Also for the probability crowd a question:
What is the probability that two metal tape measures used to check the same measurement will have the same error in the same direction? In other words what is the confidence level here?
If my process calls out that a part be checked by two persons and two different tapes, can I claim a reasonable degree of confidence that the measurement is correct?
Happy Friday
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Tape measures used by production personnel are verified during production by one or more of the following methods.
1) Checking the same measurement with another tape measure.
2) Checking the same measurement with another, more precise instrument.
3) Verified by checks at subsequent manufacturing operations.
4) Checked against a steel rule
Tape measures used by Quality Control personnel are verified at least monthly against a steel rule maintained for this purpose .
**********************************************************
What does the group think, will this fly?
Also for the probability crowd a question:
What is the probability that two metal tape measures used to check the same measurement will have the same error in the same direction? In other words what is the confidence level here?
If my process calls out that a part be checked by two persons and two different tapes, can I claim a reasonable degree of confidence that the measurement is correct?
Happy Friday