MSA(测量系统分析)课件

Measurement

Systems

Analysis測量系統分析11黄骅市建辰光电子有限公司ConfidentialObjectivesllll●IntroduceMeasurementSystemsAnalysis測量系統分析介紹ShowitslinkintotheimprovmentStrategy介紹和改善方面的關聯Definebasicmeasurementterminology術語簡介Definedifferenttypesofmeasurementsystems定義不同的量測系統類型DefineandexplainGR&Rform定義并說明GR&R表單12黄骅市建辰光电子有限公司ConfidentialAProcess（過程）:將輸入轉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需要通過一個感應系統來表達。•

Observations•

Measurements•

Information•

DataInputsOutputsProcess13黄骅市建辰光电子有限公司ConfidentialAProcess（過程）:將輸入轉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果。--the“MeasurementProcess”.Parts(Example)•

ObservationsInputsOutputsInputsMeasurementProcessOutputs•

Measurements•

Information•

DataProcess14黄骅市建辰光电子有限公司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、環境及假設的集合。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對過程和結果進行監視和測量Action采取措施，持續改進15黄骅市建辰光电子有限公司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黄骅市建辰光电子有限公司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環境17黄骅市建辰光电子有限公司ConfidentialMeasurementSystemsAnalysis18黄骅市建辰光电子有限公司ConfidentialEXERCISE:

Accuracy（準確度）

vs.Precision（精確度）xxxxxxxx

xxx

xxxxxxShotgunPelletsorTargetHoseDropletsxxxxx

xxxxxxxx

xxxxAccurate?YesxxNoNoxxPrecise?Yesxx1.Precision（精確度）：與測量數值之間的差異結果；2.Accuracy（準確度）：與真值之間的接近結果。19黄骅市建辰光电子有限公司ConfidentialEXERCISE:

Accuracy（準確度）

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

Value

=

Bull's

EyeI.Precise,notaccurateXbar==2.AccuracyTrue

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

ValueIII.Preciseandaccurate110黄骅市建辰光电子有限公司ConfidentialTerminology術語lAccuracy-relatedterms:-

Truevalue（真值）-

Bias（基值）-

Calibration（校正）-

Linearity

（線性）Precision-relatedterms-

Repeatability（重復性）l-

Reproducibility（在線性）Stability（穩定性）：隨著時間的變化。l(i.e.,Aretheaboveconsistentovertime?)111黄骅市建辰光电子有限公司ConfidentialGeneralDefinitions:Repeatability:（重復性）：一個人針對一個項目數次測量值的分散性。Theamountofinconsistency(i.e.,disagreement,scatter,variation,etc.)inanswers/resultsexhibitedbyonepersonevaluatingthesameitem(s)severaltimes.Reproducibility:

（再現性）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黄骅市建辰光电子有限公司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ActualProcessVariationMeasurementProcessVariationLong-termShort-termVariationVariationduetoVariationduetooperators(人)“Other”Sources-Environmental-etc.環境等其他ProcessVariationProcessVariationwithinsamplegage(量具）RepeatabilityCalibration校準Stability穩定性Linearity(線性）重復性113黄骅市建辰光电子有限公司ConfidentialMeasurmentSystemAnalysisForVariablesData“TheGageR&RStudy”114黄骅市建辰光电子有限公司ConfidentialGR&R使用時機1.Neworimprovedgage、measureandtestequipment新的或者改進的量具、測量和試驗設備2.Theoutflowofmeasurepersons測量人員的流失；3.Atplannedintervals一定時間間隔115黄骅市建辰光电子有限公司ConfidentialThe

Measurement

SystemParts(Example)•

Observations•

Measurements•

DataInputsOutputsInputsMeasurement

OutputsProcessProcess+=Ex:

Bathroom

scale

always

reads2

pounds

lower

than

the

truthAvgMeasurementSystem

Bias

-Determined

through“Calibration

Study”AvgAvg116黄骅市建辰光电子有限公司ConfidentialThe

Measurement

System

will

transmit

variation

to

our

data.Parts(Example)•

Observations•

Measurements•

DataInputsOutputsInputsMeasurement

OutputsProcessProcessProductVariabilityMeasurementVariabilityTotalVariability(Observedvariability)(Actualvariability)+=Measurement

SystemVariability

-

Investigatedthrough

“R&R

Study”117黄骅市建辰光电子有限公司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黄骅市建辰光电子有限公司ConfidentialEXAMPLE440430420410400390380370360UCL=432.0Avg=399.9LCL=367.8510

15

20

25

30

35

40

45

50

55

60

65

70

75MeasurementIDNumberIronContent(ppm)119黄骅市建辰光电子有限公司ConfidentialInadequateMeasurementSystemRevealed440430420UCL=432.0Avg=399.9LCL=367.830410206040039038037036040105070510

15

20

25

30

35

40

45

50

55

60

65

70

75MeasurementIDNumberIronContent(ppm)120黄骅市建辰光电子有限公司ConfidentialPossibleSourcesofMeasurementVariationObservedProcessVariationActualProcessVariationMeasurementVariationLong-termShort-termVariationVariationduetogageVariationduetooperators“Other”Sources-Environmental-etc.ProcessVariationProcessVariat