ANSI ASTM E456 REV A-2013 Standard Terminology Relating to Quality and Statistics.pdf

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1、Designation: E456 13a4An American National StandardStandard TerminologyRelating to Quality and Statistics1This standard is issued under the fixed designation E456; the number immediately following the designation indicates the year oforiginal adoption or, in the case of revision, the year of last re

2、vision. A number in parentheses indicates the year of last reapproval. Asuperscript epsilon () indicates an editorial change since the last revision or reapproval.This standard has been approved for use by agencies of the U.S. Department of Defense.1NOTENew terms were added and other terms were corr

3、ected editorially in May 2014.2NOTENew terms were added and other terms were corrected editorially in March 2015.3NOTENew terms were added and other terms were corrected editorially in April 2016.4NOTENew terms were added and other terms were corrected editorially in February 2017.1. Scope1.1 This s

4、tandard is the general terminology standard forterms defined in the standards of Committee E11 on Qualityand Statistics.1.2 A term in this standard which lists an attribution to anE11 technical standard indicates that the standard is normativefor that term. Any changes in the term definition in then

5、ormative standard will be editorially changed in this standard.Any terms added to an E11 standard will be editorially addedto this standard with an attribution to that standard.1.3 Term definitions that are similar to ISO 3534 will benoted in this standard, but ISO 3534 will not be considerednormati

6、ve for any E11 terms.2. Referenced Documents2.1 ASTM E11 Standards with Terms in This Standard:2E29 Practice for Using Significant Digits in Test Data toDetermine Conformance with SpecificationsE105 Practice for Probability Sampling of MaterialsE141 Practice for Acceptance of Evidence Based on theRe

7、sults of Probability SamplingE177 Practice for Use of the Terms Precision and Bias inASTM Test MethodsE178 Practice for Dealing With Outlying ObservationsE691 Practice for Conducting an Interlaboratory Study toDetermine the Precision of a Test MethodE1169 Practice for Conducting Ruggedness TestsE132

8、5 Terminology Relating to Design of ExperimentsE1402 Guide for Sampling DesignE1488 Guide for Statistical Procedures to Use in Developingand Applying Test MethodsE1994 Practice for Use of Process Oriented AOQL andLTPD Sampling PlansE2234 Practice for Sampling a Stream of Product by Attri-butes Index

9、ed by AQLE2281 Practice for Process Capability and PerformanceMeasurementE2282 Guide for Defining the Test Result of a Test MethodE2334 Practice for Setting an Upper Confidence Bound Fora Fraction or Number of Non-Conforming items, or a Rateof Occurrence for Non-conformities, Using AttributeData, Wh

10、en There is a Zero Response in the SampleE2489 Practice for Statistical Analysis of One-Sample andTwo-Sample Interlaboratory Proficiency Testing ProgramsE2554 Practice for Estimating and Monitoring the Uncer-tainty of Test Results of a Test Method Using ControlChart TechniquesE2555 Practice for Fact

11、ors and Procedures for Applying theMIL-STD-105 Plans in Life and Reliability InspectionE2586 Practice for Calculating and Using Basic StatisticsE2587 Practice for Use of Control Charts in StatisticalProcess ControlE2655 Guide for Reporting Uncertainty of Test Results andUse of the Term Measurement U

12、ncertainty in ASTM TestMethodsE2696 Practice for Life and Reliability Testing Based on theExponential DistributionE2709 Practice for Demonstrating Capability to Complywith an Acceptance ProcedureE2762 Practice for Sampling a Stream of Product by Vari-ables Indexed by AQLE2782 Guide for Measurement S

13、ystems Analysis (MSA)E2819 Practice for Single- and Multi-Level ContinuousSampling of a Stream of Product byAttributes Indexed byAQLE2935 Practice for Conducting Equivalence Testing inLaboratory Applications1This terminology is under the jurisdiction ofASTM Committee E11 on Qualityand Statistics and

14、 is the direct responsibility of Subcommittee E11.70 on Editorial/Terminology.Current edition approved Nov. 15, 2013. Published December 2013. Originallyapproved in 1972. Last previous edition approved in 2013 as E456 13. DOI:10.1520/E0456-13AE04.2For referenced ASTM standards, visit the ASTM websit

15、e, www.astm.org, orcontact ASTM Customer Service at serviceastm.org. For Annual Book of ASTMStandards volume information, refer to the standards Document Summary page onthe ASTM website.Copyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United StatesT

16、his international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for theDevelopment of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade

17、(TBT) Committee.1E3080 Practice for Regression Analysis2.2 ISO Standards:3ISO 3534 StatisticsVocabulary and SymbolsPart 2 Applied Statistics3. Terminologyacceptance quality limit (AQL), nquality limit that is theworst tolerable process average when a continuing series oflots is submitted for accepta

18、nce sampling. E2234accepted reference value, na value that serves as anagreed-upon reference for comparison, and which is derivedas: (1) a theoretical or established value, based on scientificprinciples, (2) an assigned or certified value, based onexperimental work of some national or internationalo

19、rganization, or (3) a consensus or certified value, based oncollaborative experimental work under the auspices of ascientific or engineering group. E177accuracy, nthe closeness of agreement between a test resultand an accepted reference value. E177aliases, nin a fractional factorial design, two or m

20、ore effectswhich are estimated by the same contrast and which,therefore, cannot be estimated separately. E1325area sampling, nprobability sampling in which a map, ratherthan a tabulation of sampling units, serves as the samplingframe. E1402assignable cause, nfactor that contributes to variation in a

21、process or product output that is feasible to detect andidentify (see special cause). E2587attributes data, nobserved values or test results that indicatethe presence or absence of specific characteristics or countsof occurrences of events in time or space. E2587attributes, method of, nmeasurement o

22、f quality by themethod of attributes consists of noting the presence (orabsence) of some characteristic or attribute in each of theunits in the group under consideration, and counting howmany units do (or do not) possess the quality attribute, orhow many such events occur in the unit, group, or area

23、.E2334audit subsample, na small subsample of a sample selectedfor review of all sample selection and data collectionprocedures. E141average outgoing quality (AOQ), nthe average percentdefective of outgoing product including all accepted lots orbatches, after any defective units found in them are rep

24、lacedby acceptable units, plus all lots or batches which are notaccepted after such lots or batches have been effectively100 % inspected and all defective units replaced by accept-able units. E1994average outgoing quality limit (AOQL), nthe maximum oftheAOQs for all possible incoming percentages def

25、ective forthe process, for a given acceptance sampling plan. E1994average quality protection, na type of protection in whichthere is prescribed some chosen value of average percentdefective in the product after inspection (average outgoingquality limit (AOQL), that shall not be exceeded in the longr

26、un no matter what may be the level of percent defective inthe product submitted to the inspector. E1994average run length (ARL), nthe average number of timesthat a process will have been sampled and evaluated beforea shift in process level is signaled. E2587balanced incomplete block design (BIB), na

27、n incompleteblock design in which each block contains the same numberk of different versions from the t versions of a singleprincipal factor arranged so that every pair of versionsoccurs together in the same number, , of blocks from the bblocks. E1325bias, nthe difference between the expectation of

28、the testresults and an accepted reference value. E177binary scale, nnominal scale with only two possiblecategories. E2282block factor, na factor that indexes division of experimentalunits into disjoint subsets. E1325bulk sampling, nsampling to prepare a portion of a mass ofmaterial that is represent

29、ative of the whole. E1402c chart, ncontrol chart that monitors the count of occur-rences of an event in a defined increment of time or space.E2587calibration, nprocess of establishing a relationship betweena measurement device and a known standard value(s).E2782center line, nline on a control chart

30、depicting the averagelevel of the statistic being monitored. E2587chance cause, nsource of inherent random variation in aprocess which is predictable within statistical limits (seecommon cause). E2587characteristic, na property of items in a sample or popula-tion which, when measured, counted or oth

31、erwise observed,helps to distinguish among the items. E2282check sample, nsee control sample. E2554classification of defects, nthe enumeration of possible de-fects of the unit of product arranged according to theirseriousness, that is, critical, major, or minor defect. E2234cluster sampling, nsampli

32、ng in which the sampling unitconsists of a group of subunits, all of which are measured forsampled clusters. E1402coefficient of determination, nsquare of the correlationcoefficient, r. E30803Available from International Organization for Standardization (ISO), 1, ch. dela Voie-Creuse, CP 56, CH-1211

33、 Geneva 20, Switzerland, http:/www.iso.org.E456 13a42coefficient or variation (CV), nfor a nonnegativecharacteristic, the ratio of the standard deviation to the meanfor a population or sample. E2586collaborative study, ninterlaboratory study in which eachlaboratory uses the defined method of analysi

34、s to analyzeidentical portions of homogeneous materials to assess theperformance characteristics obtained for that method ofanalysis. E2489collaborative trial, nsee collaborative study. E2489common cause, nsee chance cause. E2587completely randomized design, na design in which thetreatments are assi

35、gned at random to the full set of experi-mental units. E1325completely randomized factorial design, na factorial ex-periment (including all replications) run in a completelyrandomized design. E1325component of variance, na part of a total variance identifiedwith a specified source of variability. E1

36、488composite design, na design developed specifically forfitting second order response surfaces to study curvature,constructed by adding further selected treatments to thoseobtained from a 2nfactorial (or its fraction). E1325confidence bound, nsee confidence limit. E2586confidence coefficient, nsee

37、confidence level. E2586confidence interval, nan interval estimate L, U with thestatistics L and U as limits for the parameter and withconfidence level 1-, where Pr(L U) 1-. E2586confidence level, nthe value, 1-, of the probability associ-ated with a confidence interval, often expressed as apercentag

38、e. E2586confidence limit, neach of the limits, L and U, of aconfidence interval, or the limit of a one-sided confidenceinterval. E2586confounded factorial design, na factorial experiment inwhich only a fraction of the treatment combinations are runin each block and where the selection of the treatme

39、ntcombinations assigned to each block is arranged so that oneor more prescribed effects is (are) confounded with the blockeffect(s), while the other effects remain free fromconfounding. E1325confounding, ncombining indistinguishably the main effectof a factor or a differential effect between factors

40、 (interac-tions) with the effect of other factor(s), block factor(s) orinteractions(s). E1325consumers risk, nprobability that a lot having specifiedrejectable quality level will be accepted under a definedsampling plan. E2555continuous sampling inspection, na method of sampling astream of product i

41、n order of production where the samplingfrequency is adjusted based on ongoing inspection results.E2819contrast, na linear function of the observations for which thesum of the coefficients is zero. E1325contrast analysis, na technique for estimating the param-eters of a model and making hypothesis t

42、ests on preselectedlinear combinations of the treatments (contrasts). E1325control chart, nchart on which are plotted a statisticalmeasure of a subgroup versus time of sampling along withlimits based on the statistical distribution of that measure soas to indicate how much common, or chance, cause v

43、ariationis inherent in the process or product. E2587control chart factor, na tabulated constant, depending onsample size, used to convert specified statistics or parametersinto a central line value or control limit appropriate to thecontrol chart. E2587control limits, nlimits on a control chart that

44、 are used ascriteria for signaling the need for action or judging whethera set of data does or does not indicate a state of statisticalcontrol based on a prescribed degree of risk. E2587control sample, nsample taken from a stable, homogeneousmaterial for the purposes of monitoring the performance of

45、a test method in a laboratory. E2554correlation coeffecient, nfor a population, , a dimension-less measure of association between two variables X and Y,equal to the covariance divided by the product of Xandtimes Y. E3080correlation coeffecient, nfor a sample, r, the estimate of theparameter from the

46、 data. E3080covariance, nof a population, cov(X, Y), for two variables,X and Y, the expected value of (X X)(Y Y). E3080covariance, nof a sample, the estimate of the parametercov(X, Y) from the data. E3080critical defect, na defect that judgment and experienceindicate would result in hazardous or uns

47、afe conditions forindividuals using, maintaining, or depending upon theproduct, or a defect that judgment and experience indicate islikely to prevent performance of the function of a major enditem. E2234defect, nany nonconformance of the unit of product withspecified requirements. E2234degrees of fr

48、eedom, nthe number of independent data pointsminus the number of parameters that have to be estimatedbefore calculating the variance. E2586dependent variable, na variable to be predicted using anequation. E3080design of experiments, nthe arrangement in which anexperimental program is to be conducted

49、, and the selectionof the levels (versions) of one or more factors or factorcombinations to be included in the experiment. Synonymsinclude experiment design and experimental design. E1325E456 13a43double sampling plan, na multiple sampling plan in whichup to two samplings can be taken and evaluated to accept orreject a lot. E2234equal complete coverage result, nthe numerical character-istic of interest calculated from observations made bydrawing randomly from the frame, all of the sa