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Former Member
Oct 31, 2012 at 06:41 AM

how to sum multiple insp. char for same category defects?

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hi all ,

our raw material's inspec char break down to 3 category,apply sample shceme,valuation mode:attribute inpection noconf.units


inpection plan such as

inpec. char cate Qualitative Sampling procedure
------------ ---- ---------- -----------------------
char1 A X ISO 2859-1 / level S-3(AQL=0.65)
char2 A X ISO 2859-1 / level S-3(AQL=0.65)

char3 B X ISO 2859-1 / level S-4(AQL=1.5)
char4 B X ISO 2859-1 / level S-4(AQL=1.5)

char5 C X ISO 2859-1 / level I(AQL=4.0)
char6 C X ISO 2859-1 / level I(AQL=4.0)


when 3200pcs goods receipt for purchase ,the inpect lot generate and max sapmle size = 50pcs
recording result for above inpec. lot

for C cate inspec char , if noconfi. units >6 ,then valuation=ng (reject)

inspec . char noconf.units cate valuation
------------- -------------- --------- ----------
char5 4 C ok
char6 3 C ok

but valuation individua for inspect . char , how to sum the inpec. char by cate

i want it to be

C cate noconfi. units = 3+4 = 7 ,valuation = reject

best regars
toby lee