SOC 202 Study Guide - Statistical Process Control, Central Limit Theorem, Six Sigma

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Statistical process control planning process: define the quality characteristics - define in detail what to be controlled, diff characteristics req diff approaches for control purposes, std eval measurement. 2. for each characteristics: determine quality control point each inspection adds cost to product. Lo 2: statistical process control statistical process control - stat eval of product in production process periodic samples compare w/ predetermined limits results outside lime stop process corrective action. Why use both sample mean and sample range control charts: lcl = d3, diff perspective. Individual unit and moving range control chart individual unit (x) control chart - control chart for indiv unit used to monitor single observations (n=1: ucl = Moving range (mr) control chart - control chart for moving range (diff b/ consecutive observations used to monitor dispersion/spread when n=1: lcl = Z : ucl = 3. 27, lcl = 0 = 0 o. = av of moving ranges (absolute val of diff b/ 2 consecutive observations)