An HRESULT indicates whether a COM method succeeded or failed. Strategies for Handling Errors in COM overview HRESULT values COM returns an HRESULT value for all methods in all component interfaces. You can use this COM library with any COM-compliant language. 9 Minitab Command Automation Objects My Menu My Menu Overview A Minitab Automation Object Reference Application object ApplicationOptions object UserInterface object OutputWindow object Project object B Worksheet Object Reference Worksheets Collection object Worksheet object Columns Collection object Column object Constants Collection object Constant object Matrices Collection object Matrix object C Command Object Reference Commands Collection object Command object Outputs Collection object Output object OutputDocument object Title object Paragraph object Table object Formula object FormulaCoefficients Collection object FormulaCoefficient objectĤ Contents Graph object OutList object Triangle object Message objectĥ Getting Started 1 Getting Started Introducing Automation in Minitab The COM automation library contains a set of standard COM (Component Object Model) objects that expose much of Minitab s internal functionality. 5 Strategies for Handling Errors in COM overview Data s. can be found at All other marks referenced remain the property of their respective owners. and the Minitab logo are registered trademarks of Minitab, Inc., in the United States and other countries. If this is 30 consecutive parts then check to see if you other underlying issues such as cavity differences, machine fixture differences, etc.2 Minitab Inc by Minitab Inc. Also looks like data may be taken at intervals that are too far apart. That said, I have one more question: Are your spec limits true or are they control limits? You may have to recalculate control limits. Review the rules for Control Charts below. At this point given your USL and LSL I would be more inclined to perform a Gage R&R to see if you are even capable of measuring the tolerance within those specifications. All of your points lie below the mean and are trending upward. Your data is simply out of control not sure if its Non-Normal as Mr Haynes said or not, but certainly out of control. Have a look at what lies behind the Estimate button and use the Help button to drill down to Methods and Formulae for all the gory details. The estimate of sigma you used is essentially what it refers to as StDev(Between). It refers to this estimate of sigma as StDev(Within). The mean moving range divided by the constant d2 (1.128 for ranges based on samples of two measurements) gives an estimate of the process sigma which leads to the value you got from Minitab. Copy this formula down the column to get all 29 moving ranges. Once two have been measured the formula ABS(B3-B2) in cell C3 gives the first moving range of 0.02. (See below.) With only one part measured no moving range can be calculated. Use the estimate of standard deviation obtained via the mean moving range method. Where A1 is the cell that contains the process averageĪ2 is the cell that contains the process standard deviationĪ3 is the cell that contains the Upper Spec LimitĪ4 is the cell that contains the Lower Spec Limit. Have worked out Cpk long hand in excel – Cpk = 0.71 see belowĪnd get two quite different results – why ?