Sampling Inspection by Variables |
Contents
The Operating Characteristic Curve | 1 |
Variables Sampling When the Product Standard Deviation Is Known | 7 |
Mathematical Basis of Variables Acceptance Plans | 13 |
Copyright | |
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Common terms and phrases
accept the lot acceptable quality level acceptance criterion acceptance inspection AQL class attribute plans calculations Chap coefficient of displacement computing constant control charts control limit costs criteria defective items determine double double-sampling plan error curve estimate Ex² first-sample formula inspec inspection level inspection lots accepted item quality items in submitted items inspected known-sigma plans lot is accepted lot to lot lower limit normal distribution normal inspection number of defectives number of items obtained OC curve Operating Characteristic Curves percent defective percentage of defective Percentage of submitted plotted possible probability of accepting process average proportion defective reduced inspection sample items sample mean sample size sample sizes sample standard deviation sample-size letter sampling inspection sampling plan second sample selected AQL sheets single-limit single-sampling plans specification limit steps submitted inspection lots supplier tightened inspection tion two-sided upper limit variables inspection variables plans