WeibullBestFitOptions Class
 |
Member of: SynthesisAPI
Represents the analysis settings for the CalculateBestFit method of the associated WeibullDataSet object.
Methods
| Name | Description |
|---|---|
| AllowAllDistributions | Sets the first eleven properties in the class (as shown below) to true. |
| AllowNoneDistributions | Sets the first eleven properties in the class (as shown below) to false. |
Properties
| Name | Description |
|---|---|
| AllowExponential1 | Indicates whether the 1-parameter exponential distribution will be considered. Boolean. Default value = True. |
| AllowExponential2 | Indicates whether the 2-parameter exponential distribution will be considered. Boolean. Default value = True. |
| AllowGamma | Indicates whether the gamma distribution will be considered. Boolean. Default value = True. |
| AllowGenGamma | Indicates whether the generalized gamma distribution will be considered. Boolean. Default value = True. |
| AllowGumbel | Indicates whether the Gumbel distribution will be considered. Boolean. Default value = True. |
| AllowLogistic | Indicates whether the logistic distribution will be considered. Boolean. Default value = True. |
| AllowLogLogistic | Indicates whether the loglogistic distribution will be considered. Boolean. Default value = True. |
| AllowLognormal | Indicates whether the lognormal distribution will be considered. Boolean. Default value = True. |
| AllowNormal | Indicates whether the normal distribution will be considered. Boolean. Default value = True. |
| AllowWeibull2 | Indicates whether the 2-parameter Weibull distribution will be considered. Boolean. Default value = True. |
| AllowWeibull3 | Indicates whether the 3-parameter exponential distribution will be considered. Boolean. Default value = True. |
| Analysis | Gets or sets a value from the WeibullSolverMethod enumeration, which specifies the method (e.g., RRX, MLE, etc.) for estimating the parameters of the distribution. Default value = 0 (RRX). |
| ConfBounds | Gets or sets a value from the WeibullSolverCBMethod enumeration, which specifies the method for calculating the confidence bounds. Default value = 0 (Fisher Matrix method). |
| RankingMethod | Gets or sets a value from the WeibullSolverRankMethod enumeration, which specifies the rank method for calculating the unreliability estimates of the times-to-failure data. Default value = 0 (median ranks). |
| SortBeforeCalculations | Indicates whether the failures/suspension times in the data set are sorted in ascending order before calculation. Boolean. Default value = True. |
| UngroupedGroupedData | Indicates whether to ungroup a grouped data set when using rank regression. Boolean. Default value = False. |
| UseRSRegression | Indicates whether to use ReliaSoft's ranking method (RRM) to calculate the unreliability estimates for times-to-failure data. Boolean. Default value = False. |
| UseSpecialSort | Indicates whether failures will always be put before suspensions when two identical times are encountered. Boolean. Default value = True. |
Example
The following example demonstrates how to initialize the goodness of fit analysis settings for a particular WeibullDataSet object.
VBA 'Declare a new WeibullDataSet object. Dim WDS As New WeibullDataSet 'Specify the analysis settings. WDS.BestFitSettings.AllowAllDistributions WDS.BestFitSettings.Analysis = WeibullSolverMethod_MLE WDS.BestFitSettings.ConfBounds = WeibullSolverCBMethod_FisherMatrix WDS.BestFitSettings.RankingMethod = WeibullSolverRankMethod_Median WDS.BestFitSettings.SortBeforeCalculations = True WDS.BestFitSettings.UngroupGroupedData = False WDS.BestFitSettings.UseRSRegression = False WDS.BestFitSettings.UseSpecialSort = True 'Add failure times to the data set. Call WDS.AddFailure(10, 1) Call WDS.AddFailure(20, 1) Call WDS.AddFailure(30, 1) 'Analyze the data set. Call WDS.CalculateBestFit()
VB.NET 'Declare a new WeibullDataSet object. Dim WDS As New WeibullDataSet 'Specify the analysis settings. Call WDS.BestFitSettings.AllowAllDistributions WDS.BestFitSettings.Analysis = WeibullSolverMethod.MLE WDS.BestFitSettings.ConfBounds = WeibullSolverCBMethod.FisherMatrix WDS.BestFitSettings.RankingMethod = WeibullSolverRankMethod.Median WDS.BestFitSettings.SortBeforeCalculations = True WDS.BestFitSettings.UngroupGroupedData = False WDS.BestFitSettings.UseRSRegression = False WDS.BestFitSettings.UseSpecialSort = True 'Add failure times to the data set. WDS.AddFailure(10, 1) WDS.AddFailure(20, 1) WDS.AddFailure(30, 1) 'Analyze the data set. WDS.CalculateBestFit()