1、EIA STANDARD ANSUEIA-584-1991 Approved: June 14, 1991 Reaffirmed: June 12, 1997 Reaffirmed: September 5, 2002 Zero Acceptance Number Sampling Procedures and Tables for Inspection by Attributes of A Continuous Manufacturing Process EIA-584 JUNE 1991 ELECTRONIC INDUSTRIES ALLIANCE GOVERNMENT ELECTRONI
2、CS AND INFORMATION TECHNOLOGY ASSOCIATION A SECTOR OF Elsctranic industries Alliance Copyright Government Electronics distribution is unlimited. Copyright Government Electronics this results in relatively simple equations for analyzing the sampling plans. Copyright Government Electronics term averag
3、e proportion nonconforming, assuming that the requirements for a continuous manufacturing process in Section 3.2.1 are satisfied. For lot sizes that are less than 20 times the sample size, use the equation below Table 2 to calculate AOQ. Data accumulated over successive lots can be used to calculate
4、 an average quality in PPM in accordance with EL4 STD 554. (See Section 2.2) 3.3 SELECTION When the conditions of Paragraph 3.2.1 are met for a continuous manufacturing process, refer to either Table 1 or the individual Operating Characteristic curves in Appendix A to select the desired level of pro
5、tection for the consumer. Then locate the selected sample size in Table 2 to veri the minimum lot size required. If the existing lot size is not equal to or larger than the value in Table 1, the Average Outgoing Quality curves in Appendix A should not be used for estimating the long term average pro
6、portion defective. For example, use Table 1 and assume a consumer protection of 95% is selected, which means that the probability of accepting a lot of material is only 5% for a specific proportion of nonconforming items (p) in the material being inspected. If the selected value of p equals 600 PPM,
7、 the required sample size is 5000. The appropriate Operating Characteristic curve is shown in Appendix A, along with the Average Outgoing Quality curve. If the lot size equals or exceeds the value shown in Table 2, which is lOO,OOO, then the long term Average Outgoing Quality Limit (AOQL), which is
8、the maximum AOQ over all possible levels of incoming quality, is approximately 74 PPM. For any inspection lot from a continuous process, the probability of accepting a lot from a process producing a proportion p of nonconforming units, based on inspecting a sample size of n with an acceptance number
9、 of zero, is found by using binomial probabilities as - - _ EIA 584 91 W 3234600 0077372 7 Pa = (1 - p)“ Copyright Government Electronics Le., p = 1 - (Pa)In, and then expressed in parts per million. Copyright Government Electronics & Information Technology Association Reproduced by IHS under licens
10、e with GEIA Not for ResaleNo reproduction or networking permitted without license from IHS-,-,-EIA 584 91 3234b00 0077376 4 W SAMPLE S1ZE.n 50 80 116 125 200 315 500 800 1,250 2,000 EIA-584 Page 9 1 MINIMUM LOT SIZE 1,000 1,600 2,320 . 2,500 4,000 6,300 10,000 16,000 25,000 40,000 TABLE 2 3,150 5,00
11、0 . 8 O00 12,500 20,000 SAMPLE SIZE AND MINIMUM LOT SIZE REQUIREMIINTS FOR AOQ CURVES FOR CONTINUOUS MA“ACI“RING PROCESS ACCEPTANCE PLANS . 63,000 1 00,000 160,000 250,000 400,000 The Average Outgoing Quality (AOQ) curves in Appendix A are calculated using AOQ = p*Pa = p*(l-p)“, and can be used & if
12、 the samples are drawn from a statistically stable continuous process and the lot size, N, is equal to or greater than the minimum shown in the following table: For lot sizes that are less than those indicated in Table 2, AOQ curves can be generated from the equation: where n is the sample size and
13、N is the lot size. Corresponding values of Pa and p are taken from the appropriate operating characteristic me for the selected value of n. AOQ = p*Pa*(l - n/N) Copyright Government Electronics & Information Technology Association Reproduced by IHS under license with GEIA Not for ResaleNo reproducti
14、on or networking permitted without license from IHS-,-,-EIA-584 Page 10 APPENDIX A OPERATING CHARACTERISTIC (OC) CURVES AND AVERAGE OUTGOING QUALITY (AOQ) CURVES FOR A CONTINUOUS MANUFACTURING PROCESS - _I_-_ I_ EIA 584 93 3234600 0077377 b D Copyright Government Electronics & Information Technology
15、 Association Reproduced by IHS under license with GEIA Not for ResaleNo reproduction or networking permitted without license from IHS-,-,-Pa(%) I 30 I 37 50 15 SAMPLE SIZE OF 50 EM-584 Page 11 P(PFM) 1 201 I 13767 19687 45007 581 55 e E a x w 8 B K I OPERATING CHARACTERISTIC CURVE UYPLE SIP OF 50 1
16、O0 90 80 70 eo 50 40 30 20 10 a O ao 40 da tao ouxiondr) pQllAun OF SuBYm UTTC-PPY - EIA 584 91 W 3234608 O077178 8 W AVERAGE OUTGOING QUALITY e 7 I a I 6 o E 0- 35 OW .e. gij 1 s :E 3 2 P 1 O O 20 40 eu m 1 00 p-aum OF summ crrwrrmnd4 LOTS-PFW * AOQL Copyright Government Electronics & Information T
17、echnology Association Reproduced by IHS under license with GEIA Not for ResaleNo reproduction or networking permitted without license from IHS-,-,- EIA 584 91 3234b00 0077379 T 90 75 EIA-584 Page 12 1316 3590 SAMPLE SIZE OF 80 AOQ(PPM) 124 610 1185 2692 4313 4570 * 4295 2837 1038 p(PPM) 126 64 1 131
18、6 3590 8627 12351 17179 28372 36754 1 559 15 55939 I 17179 28372 36754 55939 OP ERATI NG CHARACTER ISTI C CURVE SUPLE UP OF ao 100 so 80 70 eo 50 40 30 20 10 O O 20 40 Famnd.) pQuupIoFsuBymm-pRI AVERAGE 0UTGIN.G QUALITY wpLTsIpoFao O 20 40 * AOQL Copyright Government Electronics & Information Techno
19、logy Association Reproduced by IHS under license with GEIA Not for ResaleNo reproduction or networking permitted without license from IHS-,-,-EIA-584 86 SAMPLE SIZE OF 116 Page 13 87 Q F EMTI N G C HARACER I STI C C Li RVE 1 O0 90 ri ao o o 4 70 60 E 50 o 40 I a W X w v) 5 JO b y 20 O o 10 O m-=l-)
20、p-PRQKsc PROWRTKIN NORy.(oh e 5 2979 5958 3158 * 8535 2970 11880 1965 19654 1275 25495 I 420 1 442 1 r 389- 1 38922 I I I I * AOQL B 4. - . - - . . _ _._ EIA 584 91 3234600 U077380 b -AVERAGE OUTGOING QUALIN SAMM CaE OF 116 3.2 3, 1- I I I I I 28 26 2.4 22 2 i .a 1 .U 1.4 1.2 1 a8 a6 0.4 0,2 I I I I
21、 I I I 1 I I t O 40 Copyright Government Electronics & Information Technology Association Reproduced by IHS under license with GEIA Not for ResaleNo reproduction or networking permitted without license from IHS-,-,-EIA-584 Page 14 95 90 75 50 SAMPLE SIZE OF 125 410 843 2299 5530 25 10 5 1 OPERATING
22、CHARACTERISTIC CURVE SAURE SI= OF 125 11029 18252 23681 36171 100 90 ao 70 eo 50 40 30 20 10 O AVERAGE OUTGOING QUALITY WRE OZE OF 125 3 28 26 24 22 2 1 *e 1 .a I,* 1.2 1 aa a4 a2 “ 0.6 1 I I 1 1 I e$ I I I I I 1 O 10 30 40 &I - pclwun UF Cuwrn LOTS-PRI * AOQL Copyright Government Electronics & Info
23、rmation Technology Association Reproduced by IHS under license with GEIA Not for ResaleNo reproduction or networking permitted without license from IHS-,-,-SAMPLE SIZE OF 200 EIA-584 Page 15 OPERATING CHARACTERISTIC CURVE O I 228 22763 0 AVERAGE OUTGOING QUALIM ._ MUE 5 OF =O 4 O 12 16 24 m-mdd O pa
24、wTY OFSuBim LOISSPY * AOQL Copyright Government Electronics & Information Technology Association Reproduced by IHS under license with GEIA Not for ResaleNo reproduction or networking permitted without license from IHS-,-,-EIA 584 91 m 3234600 0077183 1 m AOQ(PPM) 32 155 301 EIA-584 Page 16 p(PPM) 32
25、 163 334 SAMPLE SIZE OF 315 1 o99 1166 * 1098 728 a 2198 3151 439 1 7283 I 75 I 913 I I 50 I 2198 I pl 7283 E 14513 w 14513 O AVERAGE OUTGOING QUALITY 14 0 * AOQL Copyright Government Electronics & Information Technology Association Reproduced by IHS under license with GEIA Not for ResaleNo reproduc
26、tion or networking permitted without license from IHS-,-,-z e 459 299 92 I 90 211 I 4595 5974 9168 I 37 1 1987 1 I 10 I 45951 I 431 I 575 I OPERATING CHARACTERISTIC Cl EIA-584 Page 17 AVERAGE OUTGOING QUALITY 1 e 10 Copyright Government Electronics & Information Technology Association Reproduced by
27、IHS under license with GEIA Not for ResaleNo reproduction or networking permitted without license from IHS-,-,- _ -_ EIA 584 93 3234600 0077385 5 AOQ( PPM) EIA-584 Page 18 p( PPM) . SAMPLE SIZE OF 800 12 61 I 99 I 13 64 13 I 119 270 433 460 * 433 287 187 132 360 866 1242 1731 2874 3738 57 5740 OPERA
28、TING CHARACTERISTIC SAYRE sm OF mo CURVE 100 80 80 70 60 50 40 30 20 10 O O 2 4 O paUAllYOFSUYtllEDLoT54pY O AVERAGE OUTGOING QUALITY CAYRTfaEff wo 430 400 350 300 250 200 160 100 60 O O e O e * AOQL Copyright Government Electronics & Information Technology Association Reproduced by IHS under licens
29、e with GEIA Not for ResaleNo reproduction or networking permitted without license from IHS-,-,-SAMPLE SIZE OF 1250 90 EIA-584 Page 19 84 1991 81 76 173 277 294 * 277 a4 230 554 795 1108 ty-q 3677 184 120 37 1840 2394 3677 c 8 7 8 OPERATING CHARACTER ISTI C CURVE SAURE SIZE OF 12% 1 O0 90 80 70 60 50
30、 40 30 20 IO O O ? 3 A) F-QUKIy OF suwm LoT54py AVERAGE OUTGOING QUALITY WREgPff1= 300 aeo 260 246 zu 2ob I80 160 14Q 126 100 80 60 40 I I 1 .- O 1 3 4 A) pwILRy OF suwm m-PPY * AOQL Copyright Government Electronics & Information Technology Association Reproduced by IHS under license with GEIA Not for ResaleNo reproduction or networking permitted without license from IHS-,-,-
