For a lot of items, and AQL= , inspection plans are:
| The Single sampling procedure is: |
|---|
| ", $n,"";?>* If the number of non-conforming items is "; echo $c1; if ($c1 > 0) { echo " or less"; } echo " --> accept the lot. "; echo $r1," or more --> reject the lot."; $nplot=$n; $cplot=$c1; ?> |
There is no double sampling plan in this case. Use the single plan.
In this case, consider the Single sampling plan, or use the following plan: "; while( strcmp($Dbl_C1[$cc+$code-1+$j],dn)==0 || $Dbl_C1[$cc+$code-1+$j]<0){ $j=$j+1; } $n = $Sample[$code-1+$j]; $c1 = $Dbl_C1[$cc+$code-1+$j]; $r1 = $Dbl_R1[$cc+$code-1+$j]; $c3 = $Dbl_C3[$cc+$code-1+$j]; $r3 = $Dbl_R3[$cc+$code-1+$j]; } if ($type == 1 || $type == 2){ $r3 = $c3+1; } $nplot2 = $n; $cplot2 = $c1; $rplot2 = $r1; ?>| The Double sampling procedure is: | |
|---|---|
| Step 1: | ", $n,"";?>* items. If the number of non-conforming items is 0) { echo " or less"; } echo " --> accept the lot. "; echo $r1," or more --> reject the lot. Otherwise, continue to step 2."; ?> |
| Step 2: |
", $n,"";?>* additional items. If the total number of non-conforming items is "; echo $c3," or less --> accept the lot. "; echo $r3," or more --> reject the lot."; ?> |
*Note: If the sample size(s) exceeds the lot size, apply 100% sampling of the lot.
| OC Curve | ASN Curve |
|---|---|
| The OC curve describes the probability of accepting a lot, OC(p), as a function of the proportion non-conforming (p), for the single and double sampling plans described above. | The ASN curve describes the average sample size, when employing the double sampling, as a function of the proportion of non-conforming items (p). |