MSA(測量系統(tǒng)分析)課件

Measurement

Systems

Analysis測量系統(tǒng)分析11黃驊市建辰光電子有限公司ConfidentialObjectivesllll●IntroduceMeasurementSystemsAnalysis測量系統(tǒng)分析介紹ShowitslinkintotheimprovmentStrategy介紹和改善方面的關(guān)聯(lián)Definebasicmeasurementterminology術(shù)語簡介Definedifferenttypesofmeasurementsystems定義不同的量測系統(tǒng)類型DefineandexplainGR&Rform定義并說明GR&R表單12黃驊市建辰光電子有限公司ConfidentialAProcess（過程）:將輸入轉(zhuǎn)化出輸出的一項或一組活動。ORInputsOutputsProcessParts(Example)Documents(Example)Anyinformationwegatheraboutprocessbehaviormustfirstpassthroughasensorysystem.我們所要收集的過程表現(xiàn)需要通過一個感應(yīng)系統(tǒng)來表達。?

Observations?

Measurements?

Information?

DataInputsOutputsProcess13黃驊市建辰光電子有限公司ConfidentialAProcess（過程）:將輸入轉(zhuǎn)化出輸出的一項或一組活動。Inotherwords,wemustsubmittheoutputfromthefirstprocesstoasecondprocess

換句話說，就是第二個過程的結(jié)果。--the“MeasurementProcess”.Parts(Example)?

ObservationsInputsOutputsInputsMeasurementProcessOutputs?

Measurements?

Information?

DataProcess14黃驊市建辰光電子有限公司ConfidentialBackgroundWhataremeasurementsystems?是對測量單元進行量化或被測的特性進行評估，其使用的儀器或者量具、標準、操作、方法、夾具、軟件、人員、環(huán)境及假設(shè)的集合。Whywouldwewanttocheckthem?主要是查看量測誤差。___________________________________Plan建立必要的目標和過程Do實施過程Check對過程和結(jié)果進行監(jiān)視和測量Action采取措施，持續(xù)改進15黃驊市建辰光電子有限公司ConfidentialThe

Measurement

Process

should

be

managed

as

a

true

PROCESS?

Observations?

Measurements?

DataInputsOutputsInputsMeasurementProcessOutputsProcessParts(Example)PhaseI:

ProcessMeasurement過程測量PhaseII:

ProcessAnalysis過程分析PhaseIII:

ProcessImprovement過程改進PhaseIV:

ProcessControl過程控制16黃驊市建辰光電子有限公司ConfidentialCause

&

Effect

DiagramProcessMapoftheMeasurementProcessItselfFishboneDiagramSourcesofMeasurementVariation量測變差來源Step1Step2Step3Step4ToolWorkMethods工具方法MechanicalinstabilityEase

of

Data

EntryOperatorTrainingWearCalibration

FrequencyMaintenance

StandardSufficientWorkTimeStandard

ProceduresOperatorTechniqueElectrical

InstabilityAlgorithm

Instabilty'Measurement

Variation'HumidityCleanlinessVibrationLine

Voltage

VariationTemperature

FluctuationEnvironment環(huán)境17黃驊市建辰光電子有限公司ConfidentialMeasurementSystemsAnalysis18黃驊市建辰光電子有限公司ConfidentialEXERCISE:

Accuracy（準確度）

vs.Precision（精確度）xxxxxxxx

xxx

xxxxxxShotgunPelletsorTargetHoseDropletsxxxxx

xxxxxxxx

xxxxAccurate?YesxxNoNoxxPrecise?Yesxx1.Precision（精確度）：與測量數(shù)值之間的差異結(jié)果；2.Accuracy（準確度）：與真值之間的接近結(jié)果。19黃驊市建辰光電子有限公司ConfidentialEXERCISE:

Accuracy（準確度）

vs.Precision（精確度）TargetAnalogy1.Precision==（精確度）：與測量數(shù)值之間的差異結(jié)果XbarTrue

Value

=

Bull's

EyeI.Precise,notaccurateXbar==2.AccuracyTrue

ValueII.Accurate,notprecise（準確度）：與真值之間的接近結(jié)果。Xbar==True

ValueIII.Preciseandaccurate110黃驊市建辰光電子有限公司ConfidentialTerminology術(shù)語lAccuracy-relatedterms:-

Truevalue（真值）-

Bias（基值）-

Calibration（校正）-

Linearity

（線性）Precision-relatedterms-

Repeatability（重復(fù)性）l-

Reproducibility（在線性）Stability（穩(wěn)定性）：隨著時間的變化。l(i.e.,Aretheaboveconsistentovertime?)111黃驊市建辰光電子有限公司ConfidentialGeneralDefinitions:Repeatability:（重復(fù)性）：一個人針對一個項目數(shù)次測量值的分散性。Theamountofinconsistency(i.e.,disagreement,scatter,variation,etc.)inanswers/resultsexhibitedbyonepersonevaluatingthesameitem(s)severaltimes.Reproducibility:

（再現(xiàn)性）幾個人針對同一項目測量值的分散性。Theamountofinconsistency(i.e.,disagreement,scatter,variation,etc.)inanswers/resultsexhibitedbetweendifferentpeopleevaluatingthesameitem(s).Accuracy（準確度）

與真值之間的接近結(jié)果。Theamountofinconsistency(i.e.,disagreement,scatter,variation)incomparisonwiththe“truth”(i.e.,knownvalue,correctjudgement,etc.)Resolution（分辨率）顯示裝置能有效辨識的最小的示值差。Thedegreeofroundinginthedata(a.k.a.–Displayresolutionoradequacyofthemeasurementunits)112黃驊市建辰光電子有限公司ConfidentialPossibleSourcesofVariationParts(Example)?

Observations?

Measurements?

DataInputsOutputsInputsMeasurementProcessOutputsProcess觀察的過程偏差ObservedProcessVariation量測的過程偏差實際的過程偏差A(yù)ctualProcessVariationMeasurementProcessVariationLong-termShort-termVariationVariationduetoVariationduetooperators(人)“Other”Sources-Environmental-etc.環(huán)境等其他ProcessVariationProcessVariationwithinsamplegage(量具）RepeatabilityCalibration校準Stability穩(wěn)定性Linearity(線性）重復(fù)性113黃驊市建辰光電子有限公司ConfidentialMeasurmentSystemAnalysisForVariablesData“TheGageR&RStudy”114黃驊市建辰光電子有限公司ConfidentialGR&R使用時機1.Neworimprovedgage、measureandtestequipment新的或者改進的量具、測量和試驗設(shè)備2.Theoutflowofmeasurepersons測量人員的流失；3.Atplannedintervals一定時間間隔115黃驊市建辰光電子有限公司ConfidentialThe

Measurement

SystemParts(Example)?

Observations?

Measurements?

DataInputsOutputsInputsMeasurement

OutputsProcessProcess+=Ex:

Bathroom

scale

always

reads2

pounds

lower

than

the

truthAvgMeasurementSystem

Bias

-Determined

through“Calibration

Study”AvgAvg116黃驊市建辰光電子有限公司ConfidentialThe

Measurement

System

will

transmit

variation

to

our

data.Parts(Example)?

Observations?

Measurements?

DataInputsOutputsInputsMeasurement

OutputsProcessProcessProductVariabilityMeasurementVariabilityTotalVariability(Observedvariability)(Actualvariability)+=Measurement

SystemVariability

-

Investigatedthrough

“R&R

Study”117黃驊市建辰光電子有限公司ConfidentialThe

Fundamental

Question

of

a

GR&R

Study.“Is

the

variation

(spread)

of

my

measurement

system

too

large

tostudy

the

current

level

of

process

variation?”ProductVariabilityMeasurementVariabilityTotalVariability(Observedvariability)(Actualvariability)+=118黃驊市建辰光電子有限公司ConfidentialEXAMPLE440430420410400390380370360UCL=432.0Avg=399.9LCL=367.8510

15

20

25

30

35

40

45

50

55

60

65

70

75MeasurementIDNumberIronContent(ppm)119黃驊市建辰光電子有限公司ConfidentialInadequateMeasurementSystemRevealed440430420UCL=432.0Avg=399.9LCL=367.830410206040039038037036040105070510

15

20

25

30

35

40

45

50

55

60

65

70

75MeasurementIDNumberIronContent(ppm)120黃驊市建辰光電子有限公司ConfidentialPossibleSourcesofMeasurementVariationObservedProcessVariationActualProcessVariationMeasurementVariationLong-termShort-termVariationVariationduetogageVariationduetooperators“Other”Sources-Environmental-etc.ProcessVariationProcessVariat