Effectiveness, miss rate and false alarm rate - Need formulas to calculate

N

nurcan

Hello all,

When I calculate the effectiveness, miss rate and false alarm rate with the datas in MSA manual I found below results:
effectiveness miss rate false alarm rate
appraiser A 95 % (84 in MSA) 2 % (6,3) 3 % (4,9)
appraiser B 97 % (90) 2 % (6,3) 1 % (2)
appraiser C 90 % (80) 4 % (12,5) 6 % (8,8)

For example appraiser C has accepted 6 nonconforming pieces, I calculate his miss rate as (6/150)*100=4 %.

Could you please help me to correct this calculation.

Thanks a lot,

Nurcan
 

antoine.dias

Quite Involved in Discussions
Effectiveness, false alarm, miss rate in MSA attributive

See attached file for the formulas.
Take care: there are errors in the MSA 3rd edition. See 2nd attachment.

Best regards,

Antoine
 

Attachments

  • Attribute - short & long 2005 06 20 example.xls
    60.5 KB · Views: 819
  • ERRATA - MSA 3rd edition - page 132.pdf
    67.4 KB · Views: 943
N

nurcan

Thank you for all your replies.

Problem has been solved by them.

Nurcan
 
Y

Yew Jin

In the above attachment on excel spreadsheet (long method sheet 1), the calculation on the mixed decision should be used 20-(100% matched good + 100% matched reject) instead of 50 - (100%matched good + 100%matched reject).

In this case, the mixed is to refer the sum of miss rate and false alarm.

There are no clear determination on how we calculate the mixed decision compare to the false alarm and miss rate in AIAG manual.

Are the mixed decision = false alarm and miss rate?
 
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