质量管理工具controlchart

1、Step 1Select the ProcessStep 2Determine Sampling PlanStep 3Initiate Data CollectionStep 4Calculate StatisticsStep 5Calculate Control LimitsStep 6Construct the ChartStep 7Interpret the ChartControl Chart 1 1995GOAL /QPCConstructing the Control ChartKey Success BehaviorsDont “Control Chart” everything

2、be selectiveProvide careful preparation and supportWhen in doubt, consult with an expertControl Chart 2 1995GOAL /QPCControl Chart EssentialsNoStartSelect process and type of chartYes20-25 setscollected?NoYesControl Chart complete?YesFinished calculating statistics?NoFinished calculating control lim

3、its?YesNoNoIs process “in control”?Initiate corrective action as neededYesLeave process alone. Continue to calculate, plot points, and evaluate as neededControl Chart 3 1995GOAL /QPCAssess “out of control” points for special causesEvaluate for “in statistical control”Interpret the Control ChartCalcu

4、late controllimits Construct the Control ChartCalculate statisticsCollect data Determine sampling plan Steps at at Glance: Control ChartCG p. 45Individuals & Moving RangeIV Lines Connection TimeProcess/Operation: IV Lines ConnectionOpen Heart AdmissionsDepartment:Intensive CareCharacteristics:Time i

5、n secondsSample Size:OneSample Frequency:Each patientBy: Date:EW 6/10X = 8470R = 2990X = 325.77R = 119.6Individuals: k = 26Ranges: n = 2UCL = 645UCL = 392LCL = 7LCL = 0720UCL630540450360 X270180900LCLXRmWho?When?420360300240180120600UCLRmLCLInformation provided courtesy of Parkview Episcopal Medical

6、 CenterSeconds4/9- 60011 EW 120 48012 EW 60 54013 EW 300 24025 EW 180 42030 EW 304505/2 EW 30 4803 EW 210 6904 EW 450 2405 MA 120 3609 EW 90 45013 EW 150 30014 EW 180 48014 EW 360 12016 EW 120 24017 EW 30 21019 EW 0 21020 MA 30 18022 EW 60 24023 EW 60 30023 EW 0 30024 EW 120 13030 EW 60 12030 EW 80

7、3006/6 EW 120 1806 EW 30 210 EWControl Chart 4 1995GOAL /QPCControl Chart ExampleMJII p. 48/CG p. 51p ChartGeneral Dentistry: Percent of Patients Who Failed to Keep AppointmentsHistorical Statistics:p = 39Regular HoursUCL = 47LCL =31Flex Time6050UCL40pLCL302010% Failed4036364242402026251920181610121

8、2MonthYear19921993Information provided courtesy of U.S. Navy,Naval Dental Center, San DiegoJul Aug Sep Oct Nov Dec Jan Feb Mar Apr May Jun Jul Aug SepOctControl Chart 5 1995GOAL /QPCControl Chart ExampleMJII p. 49/CG p. 53u ChartShop Process Check Solder DefectsHistorical Ave.: Historical UCL: Histo

9、rical LCL:10000 -2974 ppm8758 ppm0 ppm9000 -UCL8000 -7000 -6000 -Defect Rate (PPM)5000 -4000 -3000 -U2000 -1000 -0 -LCLChecks (3 per day)Information provided courtesy of AT&TJan 2 -Jan 3 -Jan 4 -Jan 5 -Jan 6 -Jan 7 -Jan 8 -Jan 9 -Jan 10 -Jan 11 -Control Chart 6 1995GOAL /QPCControl Chart ExampleMJII

10、 p. 50Average & RangeX & R ChartOverall Course Evaluationsn = 10 evaluations randomly sampled each week1-Not at all2-Not very3-Moderately4-Very5-Extremely5.04.5UCLX4.0LCL3.53.0UCL2.01.81.61.41.21.0.8.6.4.2RLCLInformation provided courtesy of Hamilton StandardAve. Weekly Participant Rating XWk #R1234

11、56789101112131415161718192021222324251.011.270.481.321.521.031.151.070.702.050.950.991.061.211.330.781.211.231.081.641.200.980.911.191.033.764.214.294.364.133.774.174.214.224.004.304.204.324.184.023.714.084.233.984.463.963.634.484.304.291.144.13Ave.Control Chart 7 1995GOAL /QPCControl Chart ExampleM

12、JII p. 51/CG p. 55Average & RangeProject Name (Product)Operation (Process)Specification LimitsIn-house Copy Quality TestImprove copy quality by monitoring Black DensityBlack Density not less than 1.0Date4/204/214/224/234/244/284/294/305/15/45/55/65/75/85/115/125/135/145/1510.881.251.140.740.901.210.

13、950.771.191.061.040.941.341.020.871.121.320.901.2921.361.061.291.261.180.821.191.041.151.331.121.130.951.141.091.320.961.380.9931.010.830.960.621.170.891.010.950.670.821.121.281.021.181.301.041.070.861.0141.331.051.100.961.030.920.830.980.801.210.851.001.131.040.780.931.271.2254.584.194.493.584.283.843.153.593.994.014.494.204.314.474.304.264.284.414.51Sum1.141.051.120.901.070.961.050.901.001.001.121.051.081.121.081.061.071.101.13Average, XRange, R0.480.420.330.640.280.390.240.270.520.530.170.430.390.160.430.540.390.520.30NotesRangeAverageSample M