WeibullBestFitOptions Class

Sets the Distribution Wizard and control panel settings for use with the CalculateBestFit method.

Properties

Distribution Wizard Settings

• AllowExponential1 (type: boolean) Sets whether the 1-parameter exponential distribution will be considered.
• AllowExponential2 (type: boolean) Sets whether the 2-parameter exponential distribution will be considered.
• AllowNormal (type: boolean) Sets whether the normal distribution will be considered.
• AllowLognormal (type: boolean) Sets whether the lognormal distribution will be considered.
• AllowWeibull2 (type: boolean) Sets whether the 2-parameter Weibull distribution will be considered.
• AllowWeibull3 (type: boolean) Sets whether the 3-parameter Weibull distribution will be considered.
• AllowGamma (type: boolean) Sets whether the gamma distribution will be considered.
• AllowGenGamma (type: boolean) Sets whether the generalized gamma distribution will be considered.
• AllowLogistic (type: boolean) Sets whether the logistic distribution will be considered.
• AllowLoglogistic (type: boolean) Sets whether the log-logistic distribution will be considered.
• AllowGumbel (type: boolean) Sets whether the Gumbel distribution will be considered.

General Analysis Settings

• Analysis (as WeibullSolverMethod) Sets the method for estimating the parameters of the selected distribution (e.g., rank regression on X).
• RankingMethod (as WeibullSolverRankMethod) Sets the method for calculating the unreliability estimates of the times-to-failure data (e.g., median ranks).
• UseRSRegression (as boolean) Sets whether the ReliaSoft ranking method (RRM) will be used to calculate the unreliability estimates for times-to-failure data.
• ConfBounds (as WeibullSolverCBMethod) Sets the method for calculating the confidence bounds (e.g., Fisher Matrix).
• SortBeforeCalculations (as boolean) Sets whether times-to-failure data will be sorted in ascending order before calculation.
• UngroupGroupedData (as boolean) Sets whether grouped data will be ungrouped when using rank regression.

Application Setup Option

• UseSpecialSort (type: WeibullSolverMethod) Sets whether or not to Special Sort.

Formatted Usage Example

Declare the WeibullDataSet. See New WeibullDataSet for additional details.

       Dim WDS as New WeibullDataSet

Set the various Settings.

       WDS.BestFitSettings.AllowExponential1 = True
       WDS.BestFitSettings.AllowExponential2 = True
       WDS.BestFitSettings.AllowNormal = True
       WDS.BestFitSettings.AllowLognormal = True
       WDS.BestFitSettings.AllowWeibull2 = True
       WDS.BestFitSettings.AllowWeibull3 = True
       WDS.BestFitSettings.AllowGamma = True
       WDS.BestFitSettings.AllowGenGamma = True
       WDS.BestFitSettings.AllowLogistic = True
       WDS.BestFitSettings.AllowLoglogistic = True
       WDS.BestFitSettings.AllowGumbel = True
       WDS.BestFitSettings.Analysis = WeibullSolverMethod.MLE
       WDS.BestFitSettings.RankingMethod = WeibullSolverRankMethod.Median
       WDS.BestFitSettings.UseRSRegression = False
       WDS.BestFitSettings.ConfBounds = WeibullSolverCBMethod.FisherMatrix
       WDS.BestFitSettings.UngroupGroupedData = False
       WDS.BestFitSettings.SortBeforeCalculations = True
       WDS.BestFitSettings.UseSpecialSort = True