PowerPoint Presentation

Quality: Production line- Tea Infuse

TeamMa Chi FaiShi CaiTao LiXiang JiRui LinDMAICEverything starts with a questionQ: How often do you change the tea leaf?A: No idea, but it doesnt matter

so Why dont we try to answer the question ourselves? A improvement driven direction formedDMAICDefinite of the projectsTarget Obtain infused tea with similar level of Tea Polyphenol Balance between tea polyphenol and cost

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DMAICVariance still will occur due to the machine, yet the it is sure to be legible compare to the Part-to-Part Variation variance.3Demonstrate SIPOC analysis and simulationHeater session

SupplierInputProcessTime of tea be infusedVolume of water (100L )Water temp. (90 C)Amount of Tea leaveType of tea

Concentrated of Tea Polyphenol 2g of tea leave per unit, 6 unitsTea leaveInfuse for 10 minutesCompress with high pressure for rotation

90 C Water750 ml

4 minutes

WaterInfuse time OutputCustomerDilution session

RemarkTechnician cannot provide the amount for tea leave for the production line Shake with hands in metallic container

SIPOC: Production linesimulationDActionDMAICMethodology-Testing solution

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DMAICMethodology-Testing solution

Control solutions

Sample solutionsControl solutionsSample solutions

DDMAICMethodology Testing solution Operated by the same person at each roleStir tea sample before used Filter tea sample before used with filter paperCooled the sample tea to room temperature (about 26 C) for 50 minutes

DDMAICMeasurement

Given in advanceMDMAIC8Measurement - Design of ExperimentFactors studiedTimes of tea be infused1, 2, 3, Type of teaNon quantifiableThe difference of the first factors impact on different type of tea

Response variableconcentration of Tea Polyphenols()XY

MDMAIC9Measurement - Design of ExperimentMeasurement System Variation AnalysisVariation due to GageA machine is used for measuring the concentration in the experiment.Chemical reagent might change over time.

Variation due to OperatorsCertain procedures are performed by the same operator through one block.

MDMAICVariance still will occur due to the machine, yet the it is sure to be legible compare to the Part-to-Part Variation variance.10Measurement - Design of ExperimentOther DOE Principles considerationsRandomizationNo subjective bias since we are using the machine to test the ingredient.Replication vs. RepetitionStandard proceduresAiming at insight BlockingA fixed group of members for each different type of teaMDMAIC11Measurement - Design of ExperimentStatistical Modeling considerations Discrete variables.Our main target of the experiment is to test our hypothesis.It doesnt really mater that how larger the difference can be after the difference is large enough to cause a critical failure in performance.

To sum up, a statistical model using ANOVA or something else is not of much meaning in our case. We give the regression line for showing the noticeable decreasing trend.MDMAICwe are not putting much significant on the regression model, partly because normal regression model is sure to have a intersection on the x-axis, however the concentration wont be negative.12ImprovementIDMAIC13Results of Jasmine tea

Infuse #Tea Polyphenols11.94721.23130.58240.37450.041ATea Polyphenols decrease with infuse #DMAICAnalysis result Infuse #Tea Polyphenols11.07120.32530.08940.05350.05260.008

Different type of tea, different shape of curvesTea Polyphenols decrease with infuse #Decrease rate varies with kind of tea leaveADMAICWhen to change tea leave?Suggestion 1: ObservationChange tea leave based on observation

1st2nd3rd4th5th6thInfuse #Add transparent glass layer to the container for observation

Pu-erh tea

ChallengeLabel the 1st and 6th infuse teaFrom previous data, darkness is proportional to the number of Tea Polyphenol Infuse #Tea Polyphenols11.07120.32530.08940.05350.05260.008ADMAICConcern: suggestion 1: ObservationChange tea leave based on observationLets see the number of Tea Polyphenol of Jasmine tea

Jasmine tea

ChallengeLabel the 1st and 6th infuse teaADMAICAnalysis result Infuse #Tea Polyphenols11.33920.92430.57640.29450.25060.149ATea Polyphenols cannot be determined by darkness (color)Common quality problemWhy 3 types of tea?Misleading if just investigate the Tieh-Kuan-Yin Tea and Pu-erh teaDrawing a wrong solutions DMAICOriginal Changing stragtySimilar colorTieh-Kuan-Yin Tea

Color differenceColor difference

Infuse #Tea Polyphenols11.33920.92430.57640.29450.25060.149Pu-erh Tea

Jasmine Tea

Infuse #Tea Polyphenols11.07120.32530.08940.05350.05260.008

Infuse #Tea Polyphenols11.94721.23130.58240.37450.041Original method cannot provide uniform tea polyphenols, we need to changeADMAICProposed ideaInfuseBall1Ball2Ball3Ball4Ball5Ball6Ball7Ball8Ball9Ball1011221332144321554321665432176543218654321965432110654321Change: Throw in next infuseChange:Add in next infuseNumber inside Refer to Infuse # to that box Record

DMAICAnalysis result ADMAIC21Analysis - PCA Process Capability AnalysisA

DMAICProcess Capability22ControlCDMAIC23Equipment-a device that can solve the problemI

DMAICEquipment-a device that can solve the problem

IDMAICEquipment-inside view

IDMAICConclusionWe should chance the tea leave every timeApply 6 boxes designedSolve costly problemMaintain the relatively stable level of tea Polyphenol

DMAICSome discussionsThe definition of our quality is the variance of Tea Polyphenols concentration only in our work.Further study can be focused on how many blocks we should have in the device we designed so that the level of Tea Polyphenols can meet the standards, which is too time consuming for us considering the experiment we already made.Our study is a very practical one, not so theoretical.DMAIC