ALTADataSet Class

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Revision as of 22:48, 24 February 2014 by Chris Kahn (talk | contribs)
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Provides Provides the functionality of an ALTA standard folio, including entering data in a data set, specifying analysis settings and fitting a distribution and life-stress relationship to the data set. To create plots, use the WAPlots class.

A usage example for this class is available here.

Constructors

Parameters

Name: The name of the data set.

Methods

Use these methods to enter data points into a data sheet and analyze them. The settings for the analysis are specified with this class's properties.

Add/Remove Data

  • AddFailure( Value As Double , NumberInGroup As Integer , Stress() As Object )
    AddFailure( Value As Double , NumberInGroup As Integer , Stress1 As Object )
    AddFailure( Value As Double , NumberInGroup As Integer , Stress1, Stress2 As Object )
Adds a failure time and associated stress level to the data set.


Name/Syntax Return Type Description
Add/Remove Data
AddFailure( Value As Double , NumberInGroup As Integer , Stress() As Object )
AddFailure( Value As Double , NumberInGroup As Integer , Stress1 As Object )
AddFailure( Value As Double , NumberInGroup As Integer , Stress1, Stress2 As Object )
None Adds a failure time and associated stress level to the data set.


  • AddFailure Adds a failure time and associated stress level to the data set.
  • AddSuspension Adds a suspension and associated stress level to the data set.
  • AddFailureInterval Adds a failure interval and associated stress level to the data set.
  • AddSuspensionInterval Adds a suspension interval and associated stress level to the data set.
  • AddStressDefinition Adds a stress to the data set, using the specified name of the stress, the stress transformation (if any) and the use stress level.
  • AddStressProfile Makes an existing time-varying stress profile available for use in the analysis.
  • ClearDataSet Clears all data in the data set and removes the fitted model, if any.

Analyze Data

  • Calculate Fits the model (i.e., distribution and life-stress relationship) to the current data set using the settings specified in the AnalysisSettings property.

Properties

Use these properties to specify analysis settings and view analysis results, as well as view or edit properties of the data set.

Analysis Settings

Analysis Results

  • FittedModel Gets the fitted model from the accelerated life testing analysis.
  • AnalysisResults Gets the likelihood function value that was estimated from the analysis.

Data Set Properties

  • DatasetName Provides the ability to retrieve or set the name of the data set.
  • FailureCount Returns the failure count within an ALTA data set.
  • SuspensionCount Returns the number of suspensions entered in the data set.
  • NumStresses Gets the total number of stresses in the data set.

Events

  • ALTAEvents Class all the event handlers that can be called by ALTADataSet. To use events, you must inherit the class, override its methods and assign its instance to the Events property of an ALTADataSet. ALTAEvents inheritance is not available in VB6/VBA.