20131ICN346V1 Normas Muestreo Por Atributos

8/13/2019 20131ICN346V1 Normas Muestreo Por Atributos

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MI14TD-105O29 April 1963SUPERSEDINGMIL-STD-105C18 July 1961

Y S

S G OCE ES ESFO SEC O Y ES

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MIW3TD-105D2 1APRIL1963DPART ?ftJTF D NS

ashington 25 D. CSAMPLINGPROCDURSNDTABLSIR INSP~TION M AT TR IJTES

u srblov 29 APRIL19631 This standard ha s n approved ~ the Department Of Defense and ismandatory f~ r use by the Departments Of the ~ the Navy the i orcen Defense Supp ly ency This revision supersed es MIL-STB 10 5Cdated 18 July 19612 lhis publication provides SSMpM~ proc~ure~ ad reference tablesfor use in planning and conduct- n n y attributes Thispublication was de velope d by a working group rep resenting the mi~t~SeMCeS of C~ada the United Kingdom and the united States of Americawith the assi stance and coope ration of ~ericw Ud uropean organizationsfor q~tity conLrol The international designation of this document isAL-STD-105 hen revision or cancel lation of this n r proposed the departmental custotim s uiu infG~ their respective DepartmentalStandardization Office so that appropriate action m~ be taken respectingthe international agreement concerned 3. The U S Amy Munitions co~d is designated as preparing activity forthis stadard Recommended corrections addi tions or deletions should beaddressed to the ComrnandirIgOfficer U S * CRRKngineer g OfficeAttn: 9411C S Arm Chem ical Center Mary]md



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Table ITable II-ATable II-BTable II-CTable III-ATable HI-BTable III-CTable IV-ATable IV-B

Table IV-CTable V-ATable V-BTable VI-ATable VI-BTable VII-ATable VII-BTable VIIITable I

Table -ATable -BTable -C

CON NSPage

SCOP 1CLASSIICATION O D CTS AND D CT IVS 2P RCNT D CT IV AND D CTS P R HUNDRD UNITS 2ACCPTABL QUALITY LVL AQL 3SU BMISSION O PROD UCT 3ACC~ANC AND R~CTION i 4DRAING O SAMPLS 4NOR MAL TIGHTND AND RDUCD INSP CT ION 5SAMPLING PLANS 6DTRMINATION O ACCPTABILITY 7SUPPLMNTARY INORMATION 7

A SSample Size Code Letters 9Single Sampling Plans for Normal Inspection Master Table 10Single Sampling Plans for Tightend Insp~tion Master Table 11Single Sampling Plans for Reduced Inspection Master Table 12Double Sampling Plans for Normal Inspection Master Table 13Double Sampling Plans for Tightened Inspection Master Table 14Double Sampling Plans for Reduced Inspection Master Table 15Multiple Sampling Plans for Normal Inspection Master Table 16Multiple Sampling Plans for Tightened Inspection

Master Table 18Multiple Sampling Plans for Reduced Inspection Master Table 20Average Outgoing Quality Lim it actors for Normal Inspection

Single Sampling 22Average Outgoing Quality Lim it actor for TightenedInspection Single Sampling 23

Lim iting Quality in percent de fective for which the Pa = 10~for Normal Inspection Single Sampling 24

Lim iting Quality in defects per hundred units for which thePa = 10Y for Normal Inspection Single Sampling 25

Lim iting Quality in percent defective for which the Pa = 5~Cfor Normal Inspection Single Sampling 26

Limiting Quality in defects per hundred units for whichPa = 574 for Normal Inspe ction Single Sampling 27

L im it Numbers for Reduced Inspe ction 28Average Sample Size Curves for Double and Multiple Sampling 29Sampling Plans and Operating Characteristic Curves

and Data for:Sam ple Size Code Letter A 30Sample Size Code Letter B 32Sam ple Size Code Letter C 34

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Table -DTable -Table -Table -GTable -HTable -JTable -KTable -LTable -MTable NTable -PTable -QTable -RTable -S

Sam ple Size Code Letter D 36Sample Size Code- Letter 38Sam ple Size Code Letter 40Sample Size Code Letter G 42Sample Size Code Letter H 44Sample Size Code Letter J 46Sample Size Code ktter K 48Sample Size Code Letter L 50Sam ple Size Code Letter M 52Sample Size Code Letter N 54Sam ple Size Code Letter P 56Sam ple Size Code Letter Q 58Sam ple Size Code Letter R 60Sam ple Size Code Letter S 62

IND O TRMS ITH SP CIAL MANINGS 63



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AM I ROCEDURE AD TABEOR I ECTIO BY ATTRIBUTE

1 SCOP -

1. I PURPOSE. T nis publication estab-lishes sampling plans and procedures forinspection by attributes hen spe cified bythe responsible authority this publicationshall be referenced in the specification con-tract inspection instructions or other docu-ments and the provisions set forth hereinshall govern The responsible authorityshall be designated in one of the abovedocuments

1.2 APPLICATION. Sampling plans des-ignated in this publication are applicable butnot limited to inspe ction of the following:

abcdefgh

nd item sComponents and raw materialsOpe rationsMaterials in processSupp lies in storageMaintenance ope rationsData or recordsAdm inistrative procedures

These plans are intended prim arily to beused for a continuing series of lots or batches

i

The plans may also be used for the inspectionof isolated lots or batches but in this lattercase the user is cautioned to consult theoperating characteristic curves to find a planwhich wil l yield the desired protection see11 6

1 3 INSPECTION. Inspection is the proc-ess of measuring examining testing orotherwise comparing the unit of product see1 5 with the requirem ents

1.4 INSPECTION BY ATTRIBUTES. In-spection by attributes is inspection wherebyeither the unit of product is classified simplyas de fective or nonde fective or the num berof defects in the unit of product is countedwith respect to a given requirement or setof requirem ents

1.5 UNIT OF PRODUCT. The unit ofproduct is the thing inspected in order todetermine its classification as de fective ornondefective or to count the number of de-fects It may be a single article a pair a seta length an area an ope ration a volume acom ponent of an end product or the endproduct itsel f The unit of product may ormay not be the same as the unit of purchasesupply production or shipment



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2 CASS CA ON O2.1 METHOD OF CLASSIFYING DEFECTS.

A classification of defects is the enumerationof possible defects of the unit of productclassified according to their seriousness Adefect is any nonconformance of the unit ofproduct with specified requirem ents Defectsw ill normally be grouped into one or moreof the following classes; however defectsmay be grouped into other classes or intosubclasses within these classes

2.1.1 CRITICAL DEFECT. A critical de-fect is a defect that udgment and experienceindicate is likely to result in hazardous orunsafe conditions f o r individuals usingmaintaining or depending upon the product;or a defect that udgment and experienceindicate is likely to prevent performance ofthe tactical function of a maor end item suchas a ship aircraft tank missile or spacevehicle NOT: or a special provision re-lating to critical defects see 6 3

2 1 2 MAJOR DEFECT. A maor defectis a defect other than critical that is likelyto result in failure or to reduce materiallythe usabili ty of the unit of product for itsintended purpose

3 P CN3.1 EXPRESSION OF

D C V ANDNONCONFORM.

ANCE. The extent of nonconformance ofproduct shall be expressed either in termsof percent defective or in terms of defects perhundred units

3 2 PERCENT DEFECTIVE. The percentde fective of any given quantity of units ofproduct is one hunderd tim es the number ofdefective units of product contained thereindivided by the totai number of units of prod-uct ie:

D CS AND D C VS2.1.3 MINOR DEFECT. A minor de fect

is a defect that is not likely to reduce ma-terially the usabili ty of the unit of productfor its intended purpose or is a de parturefrom established standards having little bear-ing on the effective use or operation of theunit

2 2 METHOD OF CLASSIFYING DEFEC-TIVES. A defective is a unit of product whichcontains one or more defects Defective w illusually be classified as follows:

2 2 1 CRITICAL DEFECTIVE. A criticaldefective contains one or more critical de-fects and may also contain maor and orminor defects NOT: or a special provi-sion relating to critical de fective see 6 3

2 2 2 MAJOR DEFECTIVE, A maor de-fective contains one or more maor defectsand may also contain minor defects but con-tains no critical defect

2.2.3 MINOR DEFECTIVE. A minor de -fective contains one or more minor defectsbut contains no critical or maor

DEFECTS PER HUNDRED NS

defect

Number of defectivePercent defective = Number of units inspected x lM3.3 DEFKTS PERHUNDRED UNITS. The

number of defects per hundred units of anygiven quantity of units of product is onehundred tim es the number of de fects con-tained therein one or more defects beingpossible in any unit of product divided bythe total number of units of productDefects p e Number of defectshundred units = Number of units inspected

ie:x 100

2



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44.1 USE. The AQL

Sample Size Code Letter

ACCP A Q A V AQtogether with theis used for index-

ing the sampling plans provided herein4 2 DEFINITION. The AQL is the max-

imum percent de fective or the maximumnumber of defects per hundred units thatfor purposes of sampling inspection can beconsidered satisfactory as a process averagesee 11 2

4 3 NOTE ON THE MEANING OF AQL.hen a consumer designates some specific

d value of AQL for a certain defect or groupof defects he indicates to the supplier thathis the consumers acceptance samplingplan will accept the great maority of the lotsor batches that the supplier submits pro-vided the process average level of percentde fective or defects per hundred units inthese lots or batches be no greater than thedesignated value of AQL Thus the AQLis a designated value of percent defective ordefects per hundred units that the consumerindicates will be accep ted most of the tim eby the acceptance sam pling procedure to beused The sampling plans provided hereinare so arranged that the probabili ty of ac-cep tance at the designated AQL value de -pends upon the sample size being generallyhigher for large samples than for small onesfor a given AQL The AQL alone does not

describe the protection to the consumer forindividual lots or batches but more directlyrelates to what might be expected from aseries of lots or batches provided the step sindicated in this publication are taken It isnecessary to refer to the operating character-istic curve of the plan to determine whatprotection the consumer wil l have

4 4 LIMITATION. The designation of anAQL shall not imply that the supplier hasthe right to supply knowingly any de fectiveunit of product

4 5 SPECIFYING AQLs. The AQL to beused wil l be designated in the contract or bythe responsible authority Different AQLsmay be designated for groups of de fects con-sidered colle ctively or for individual defectsAn AQL for a group of defects may be des-ignated in addition to AQL s for individualdefects or subgroups within that groupAQL values of 10 0 or less may be expressedeither in pe rcent defective or in defects pe rhundred units; those over 10 0 shall be ex-pressed in defects per hundred units only

4 6 PREFERRED AQLs. The values ofAQLs given in these tables are known aspreferred AQL s If for any product an AQLbe designated other than a preferred AQLthese tables are not app licable

i

5 S MSSON O POD C

5.1 LOT Oi? BATCH. The term lot or for other purposes eg production ship -batch shall mean inspection lot or inspec- ment etction batch ie a colle ction of units of prod- 5 2 FORMATION OF LOTS OR BATCHES.uct from which a sam ple is to be drawn and The product shall be assembled into identi-inspe cted to determine conformance with the fiable lots sublots batches or in such otheracceptability criteria and may differ from a manner as may be prescribed see 5 4 achcolle ction of units designated as a lot or batch lot or batch shall as far as is practicable

3



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5 S MSSON O POD C (Continued)consist of units of product of a single type batches lot or batch size and the mannergrade class size and composition manu- in which each lot or batch is to be presentedfactured unde r essentially the same condi- and identified by the supplie r shall be des-tions and at essentially the sam e tim e ignated or app roved by the responsible au-

thority As necessary the supplier shall5 3 LOT OR BATCH SIZE. The lot orbatch size is the number of units of product provide adequate and suitable staage spacefor each lot or batch equipment needed forin a lot or batch proper identification =d presentation and

5 4 PRESENTATION OF LOTS OR pe rsonnel for all handling of product re-BATCHES. The formation of the lots or quired for drawing of samples

6 ACCP ANC AND J C ON6.1 ACCEPTABILITY OF LOTS OR

BATCHES. Accep tabili ty of a lot or batchwill be determined by the use of a samplingplan or plans associated with the designatedAQL or AQLs

6.2 DEFECTIVE UNITS. The right is re-served to reect any unit of product founddefective during inspection whether thatunit of product forms part of a sample ornot and whether the lot or batch as a wholeis accepted or reected Reected units maybe repaired or corrected and resubm itted forinspection with the approval of and in themanner specified by the responsible au-thority

6 3 SPECIAL RESERVATION FOR CRITl-CAL DEFECTS. The supplie r may be requiredat the discretion of the responsible authorityto inspxt every unit of the lot or batch for

critical defects The right is reserved to in-spect every unit submitted by the supplier forcritical defects and to reect the lot or batchim mediately when a critical defect is found The right is resemmd also to sample for crit-ical defects every lot or batch subm itted bythe supplier and to reect any lot or batchif a sample drawn therefrom is found to con-tain one or more critical defects

6.4 RESUBMITTED LOTS OR BATCHES.Lots or batches found unaccep table shall beresubmitted for reinspection only after allunits are re-examined or retested and all de-fective units are rem oved or defects cor-rected The responsible authority shall deter-mine whether normal or tightened inspectionshall be used and whether reinspection shallinclude all types or classes of defects or forthe particular types or classes of defectswhich caused initial reection

7 DAWNG O SAMP S7 1 SAMPLE. A sample consists of one 7 2 REPRESENTATIVE SAMPLING. hen

or more units of product drawn from a lot orbatch the units of the sample being selected appropriate the number of units in the sam -at random without regard to their quality ple shall be selected in proportion to the sizeThe number of units of product in the sam ple of sublets or subbatches or parts of the lot oris the sample size batch identified by som e rational criterion

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7 DAWNG O ----- - - hen rep resentative sampling is used the

units from each part of the lot or batch shallbe selected at random

7 3 TIME OF $AMPLING. Samples maybe drawn after all the units comprising thelot or batch have been assem bled or sam -

8 NOMA GH ND8.1 INITIATION OF INSPECTION. Nor-

mal inspection will be used at the start ofinspe ction unless otherwise directed by the* responsible authority

8 2 CONTINUATION OF INSPECTION.Normal tightened or reduced inspectionshall continue unchanged for each class ofdefects or defective on successive lots orbatchs excep t where the switching proce-dures given below require change Theswitching procedures given below require achange The switching procedures shall beapplied to each class of defects or de fectiveindependently

8 3 SWITCHING PROCEDURES.8.3.1 NORMAL TO TIGHTENED. hen

normal inspection is in eflect tightened in-spection shall be instituted when 2 out of 5consecutive lots or batches have been re-ected on original inspection ie ignoringresubmitted lots or batches for this proce-dure

8 3 2 TIGHTENED TO NORMAL. hentightened inspection is in effect normal in-spection shall be instituted when 5 consecu-tive lots or batches have been consideredaccep table on original inspection

8 3 3 NORMAL TO REDUCED. W h e nnormal inspection is in effect reduced inspec-tion shall be instituted providing that all ofthe following conditions are satisfied:

SAMPLES (Continued)pies may be drawn during assem bly of thelot or batch

7 4 DOUBLE OR MULTIPLE SAMPLING.hen double or multip le sampling is to beused each sample shall be selected over theentire lot or batch

AND D CD NSP C ONa The preceding 10 lots or batches or

more as indicated by the note to Table VIIIhave been on normal inspection and nonehas been reected cm original inspection; and

b The total number of de fective or de-fects in the samples from the preced ing 10lots or batches or such other number as wasused for condition a above is equal to orless than the applicable number given mTable VIII If double or multiple samplingis in use all sam ples inspected should be in-clude d not first samples only; and

c Production is at a steady rate; andd Reduced inspection is considered de-

sirable by the responsible authority8 3 4 REDUCED TO NORMAL. When re-

duced inspection is in effect normal inspec-tion shall be instituted if any of the followingoccur on original inspection:

a A lot or batch is reected ; orb A lot or batch is considered accep table

under the procedures of 10 1 4; orc Production becomes irregular or de-

layed ; ord Other conditions warrant that normal

inspection shall be instituted 8 4 DISCONTINUATION OF INSPECTION.

In the event that 10 consecutive lots orbatches rem ain on tightened inspection orsuch other number as may be designated bythe responsible authority inspection underthe provisions of this document should bediscontinued pending action toquality of submitted material

5

improve the



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9 SAMP NG PANS9.1 SAMPLING PLAN. A sampling plan

indicates the number of units of productfrom each lot or batch which are to be in-spected sample size or series of samplesizes and the criteria for determ ining theacceptabil ity of the lot or batch acceptanceand reection numbers

9 2 INSPECTION LEVEL. The inspectionlevel determ ines the relationship be tweenthe lot or batch size and the sample size Theinspection level to be used for any particularrequirement will be prescribed by the re-sponsible authority Three inspection levels:I II and III are given in Table I for generaluse Unless otfierwise specified InspectionLevel II wil l be used However InspectionLevel I may be specified when less discrim i-nation is needed or Level III may be speci-fied for greater discrim ination our addi-tional special levels: S-1 S2 S3 and S-4are given in the same table and may be usedwhere relatively small sample sizes are neces-sary and large sampling risks can or must betolerated

NOT: In the designation of inspectionlevels S-1 to S-4 care must be exercised toavoid AQLs inconsistent with these inspec-tion levels

9 3 CODE LETTERS. Sample sizes aredesignated by code le tters Table I shall beused to find the app licable code le tter for theparticular lot or batch size and the prescribedinspection level

9 4 OBTAINING SAMPLING PLAN. TheAQL and the code le tter shall be used to ob-

tain the sampling plan from Tables II III orIV hen no sampling plan is available for agiven combination of AQL and code le tterthe tables direct the user to a different le tterThe sample size to be used is given by thenew code le tter not by the original letter Ifthis procedure leads to different sample sizesfor different classes of defects the code le ttercorresponding to the largest sample size de-rived may be used for all classes of defectswhen designated or app roved by the respon-sible authority As an alternative to a singlesampling plan with an acceptance numberof O the plan with an acceptance number of 1with its correspondingly larger sample sizefor a designated AQL where available maybe used when designated or app roved by theresponsible authority

9 5 TYPES OF SAMPLING plANS. Threetypes of sampling plans: Single Double andMultiple are given in Tables II HI and Itrespectively hen several types of plans areavailable for a given AQL and code le tterany one may be used A decision as to typeof plan either single double or multiple when available for a given AQL and codele tter wil l usually be based upon the com -parison be tween the adm inistrative difficultyand the average sample sizes of the availableplans The average sample size of multipleplans is less than for double except in thecase corresponding to single acceptance num-ber 1 and both of these are always less thana single sample size Usually the adm inistra-tive difficulty for single sampling and thecost per unit of the sample are less than fordouble or multiple

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.

10 D MNA ON10.1 PERCENT DEFECTIVE INSPECTION.

To determ ine acceptabil ity of a lot or batchunder percent defective inspection the ap-plicable sam pling plan shall be used inaccordance with 10 1 1 10 1 2 10 1 3 10 1 4and 10 1 5

10.1.1 SINGLESAMPLING PLAN. Thenumber of sample units inspected shall beequal to the sample size given by the planIf the number of defective found in thesam ple is equal to or less than the acceptancenumber the lot or batch shall be consideredacceptable If the number of defective isequal to or greater than the reection num -ber the lot or batch shall be reected

10.1.2 DOUBLE SAMPLING PLAN. Thenumber of sam ple units inspected shall beequal to the first sample size given by theplan If the number of defective found inthe first sam ple is equal to or less than thefirst acceptance num ber the lot or batchshall be considered acceptable If the num -ber of defective found in the first sam ple isequal to or greater than the first reectionnumber the lot or batch shall be reectedIf the number of defective found in the firstsam ple is between the first acceptance andreection num bers a second sample of thesize given by the plan shall be inspected The

O ACCP Anumber of defective found in the first andsecond samples shall be accumulated If thecumulative number of defective is equal toor less than the second acceptance numberthe lot or batch shall be considered accept-able If the cumulative number of defectiveis equal to or greater than the second reec-tion number the lot or batch shall be reected 10.1.3MULTIPLE SAMPLE PLAN. Under

multiple sampling the procedure shall besimilar to that specified in 10 1 2 except thatthe number of successive samples requiredto reach a decision may be more than two

10,1.4 S P EC I A L PROCEDURE FOR RE-DUCED INSPECTION. Under reduced in-spection the sampling procedure may termi-nate without ei ther acceptance or reectioncriteria having been m et In these circum -stances the lot or batch wil l be consideredacceptable but normal inspection will bereinstated starting with the next lot orbatch see 8 3 4 b10.2 DEFECTS PER HUNDRED UNITS IN-

SPECTION. To determine the acceptabilityof a lot or batch under Defects per HundredUnits inspection the procedure specified forPercent Defective inspection above shall beused except that the word defects shall besubstituted for defective

11. SUPPLEMENTARY INFORMATION11.1 0 P E RA T I N G CHARACTERISTIC

CURVES. The operating characteristic curvesfor normal inspection shown in Table pages 30 -62 indicate the percentage of

lots or batches which may be expected to beaccepted under the various sam pling plansfor a given process quality The curves shown

1 are ior single sam pling; curves for double

and multiple sampling are matched as closelyas practicable The O C curves shown forAQLs greater than 10 0 are based on thePoisson distribution and are app licable fordefects per hundred units inspection; thosefor AQLs of 10 0 or less and sample sizes of80 or less are based on the binom ial distri-bution and are applicable for percent defec-

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11 S PP MNA NOMA ON (Continuocf)

tive inspection; those for AQLs of 10 0 orless and sample sizes larger then 80 are basedon the Poisson distribution and are app lica-ble either for defects per hundred units in-spection or for percent defective inspectionthe Poisson distribution being an adequateapproximation to the binomial distributionunder these conditions Tabulated valuescorresponding to selected values of probabil-ities of acceptance Pa in percent are givenfor each of the curves shown and in addi-tion for tightened inspection and for defectsper hundred units for AQLs of 10 0 or lessand sample sizes of 80 or less

11 2 PROCESS AVERAGE. The processaverage is the average percent defective oraverage number of defects per hundred unitswhichever is applicable of product sub-mitted by the supplier for original inspec-tion Original inspection is the first inspec-tion of a particular quantity of product asdistinguished from the inspection of productwhich has been resubmitted after priorreection

11 3 AV AG O GONG Q AAO Q he AO Q is the average quality ofoutgoing product including all accep ted lotsor batches plus all reected lots or batchesafter the reected lots or batches have beeneffectively 100 percent inspected and all de-fective replaced by nondefectives

11 4 AV AG O GONG Q AM AOQ he AOQL is the maximum

of the AOQS for all possible incoming quali-ties for a given acceptance sampling planAOQL values are given in Table V-A foreach of the single sampling plans for normalinspection and in Table V-B for each of thesrngle sampling plans for tightened inspec-tion

115 AV AG SAMP SZ C VSAverage sample size curves for double andmultip le sampling are in Table I Theseshow the average sample sizes which may beexpected to occur under the various samplingplans for a given process quality The curvesassume no curtailment of inspection and areapproximate to the extent that they arebased upon the Poisson distribution and thatthe sample sizes for double and multiplesampliig are assumed to be 0 631n and 0 25nrespectively where n is the equivalent singlesample size

116 M NG Q A PO C ONhe sampling plans and associated proce-dures given in this publication were designedfor use where the units of product are pro-duced in a continuing series of lots or batchesover a period of time However if the lotor batch is of an isolated nature it is desira-ble to limit the selection of sampling plansto those associated with a designated AQLvalue that provide not less than a specifiedlimiting quality protection Sampling plansfor this purpose can be selected by choosinga Lim iting Quality LQ and a consumersrisk to be associated with it Tables VI andVII give values of LQ for the commonly usedconsumers risks of 10 percent and 5 percentrespectively If a different value of con-sumers risk is required the OC curves andtheir tabulated values may be used Theconcep t of LQ may also be useful in specify-ing the AQL and Inspection Levels for aseries of lots or batches thus fixing minimumsample size where there is some reason foravoid ing with more than a given consumersrisk more than a limiting proportion of de-fective or defects in any single lot orbatch



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Acceptable Quality Level AQL . .... .. .. ... .. ..... .. .. .... ....- 4.2 d 11.1Accep tance number ------------------------------------------------------9 4 and 10 1JAttributes --------------------------------------------------------1 4Average Outgoing Quality AOQ 11 3Average Outgoing Quality Lim it AOQ L 11 4Average sample size 11 5Batch - 5 1Classification of defects 2.1Code le tters 9 3Critical defect 2 1 1Critical defective 2 2 1Defect - 21Defective unit 2 2Defects per hundred units 3 3Double sampling plan -------------------------------------1~~2Inspection - Inspection by attributes 1 4Inspection level 9 2Inspection lot or inspection batch 5 1Isolated lot 11 6Limiting Quality LQ -----------------------------------------------11 6Lot 5 1Lot or batch size 5 3Maor defect 2 1 2Maor defective - 2 2 2M inor defect 2 1 3M inor defective 2 2 3Multiple sampling plan 10 1 3Normal inspection - 8 1 ad 8 2Operating characteristic curve 11 1Original inspection 11 2Percent defective 3 2Preferred AQb - 4 6Process average 11 2Reduced inspection 8 2 ~ 83 3Reection number 1~~lResponsible authority - Resubm itted lots or batches 6 4Sample 7 1Sample size 7.1Sample size code letter ~~ and 9 3Sampling plan Single sampling plan 1~~lSmall-sample inspection Swltchmg procedures 8 3Tightened mspectlon ~~ and 8 3 1Unit of product

63



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Copies of this standardmay be obtained by directing requeststo:CommandingOfficerU.S. Naval Supply DepotATTN : Code M l5S01Tabor AvenuePhiladelphia20, Pennsylvania

Copies of this Mlit FY Star@@ may be obtained for other thanofficialuse by individuals,firms, and contractorsfrom the Superintendentof Documents,U.S. GovernmentPrtithg Office, Washington25, D. C.Both the title and identi ing symbol number should be stipulatedwhen requestingcopies of Military Standards.

custodians:Amy - Munitions CommandNavy - Bureau of WeaponsAir Force - Air Force Logistics ComnandDefense Supply Agency

Preparing Activity:Army - Munitions Command


20131ICN346V1 Normas Muestreo Por Atributos

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