dM-3gu+3g2007.4Control chart11
Control chart 2007.4 11
u+30μ+30μ+20μ+20u+ou+oFN-OW-Oμ-20M-20M-3gμ-3g203040102030405060105060002007.4Control chart12
Control chart 2007.4 12
1, Analyzing and judging the stability of theproduction process, so that makng it be in a stateof statistical control;2, Discovering the abnormal phenomenon andvariation in the production process in time toprevent unqualified products;3, Finding out the actual precision of productionequipments and process equipments to make theright technology decisions;4, Providing a basis for evaluation of the productquality.2007.4CThe uses of control chart13
The u 2007.4 ses of control chart 1、Analyzing and judging the stability of the production process, so that makng it be in a state of statistical control; 2、Discovering the abnormal phenomenon and variation in the production process in time to prevent unqualified products; 3、Finding out the actual precision of production equipments and process equipments to make the right technology decisions; 4、Providing a basis for evaluation of the product quality. 13
The basic format of control chart consists of twoparts:2, control chart section ;1, title section;Thename of control chartX X X control chartWorkOrderNumberDuringthedata collectionProductNameWorkshopOualityCharacteristicObservation MethodRequiredDailyOutputEquipment NumberSampleIntervalOperatorSpecification Limits(OrDemands)NumberVisualizer NumberSpecificationNumberInspectorThequalityrequirementsofproductionprocess2007.4GThe title of control chart14
The title of control chart 2007.4 The name of control chart X X X control chart Product Name Work Order Number During the data collection Quality Characteristic Workshop Observation Method Required Daily Output Equipment Number Specification Limits Sample Interval Operator (Or Demands) Number Specification Number Visualizer Number Inspector The quality requirements of production process The basic format of control chart consists of two parts: 1、 title section； 2、control chart section ； 14
QualityCharacteristicxUpperToleranceLimit (Tu)UpperControlLimit (UCL)3gCentralLimit(CL)3gLower ControlLimit(LCL)Lower ToleranceLimit(TL)Sample OrderThreelines:centerline,uppercontrolNumberlimit,lowercontrollimit2007.4The basic model of control chartC15
The basic model of control chart 2007.4 3σ 3σ Upper Tolerance Limit (Tu) Lower Tolerance Limit(TL) Upper Control Limit (UCL) Lower Control Limit(LCL) Central Limit(CL) Sample Order Number Quality Characteristic x Three lines:center line,upper control limit,lower control limit 15