ALTADataSet.AddFailure

Adds a failure time and associated stress level to the data set.

Syntax

• AddFailure( Value As Double , NumberInGroup As Integer , Stress() As Object ) Adds failure times to the data set, using the specified time, the number of failures at that time and an array of stress values/profiles for all the stresses.
• AddFailure( Value As Double , NumberInGroup As Integer , Stress1 As Object ) Adds failure times to the data set, using the specified time, the number of failures at that time and a single stress value/profile.
• AddFailure( Value As Double , NumberInGroup As Integer , Stress1 As Object , Stress2 As Object ) Adds failure times to the data set, using the specified time, the number of failures at that time and two stress values/profiles.

Parameters

Value: The exact time of failure.

NumberInGroup: The number of units that failed at the Value time.

Stress(): An array containing numeric stress values or references to added ALTAStressProfiles.

Stress1: A numeric stress value or reference to an added ALTAStressProfile.

Stress2: A numeric stress value or reference to an added ALTAStressProfile.

Usage Example

Declare the ALTADataSet. See New ALTADataSet for additional details.

Dim ADS As New ALTADataSet("AddFailure_Example")

Create a Stress Definition. See AddStressDefinition for additional details.

ADS.AddStressDefinition("Stress1")

Declare an ALTAStressProfile. See ALTAStressProfile for additional details.

Dim StressProfile1 As New ALTAStressProfile("StressProfile1")
StressProfile1.RepeatCycle = True
StressProfile1.AddSegment(2, 250)
StressProfile1.AddSegment(3, 400)
StressProfile1.AddSegment(4, 500)

Add failure values to the raw data.

ADS.AddFailure(37831.0019792202, 1, 274)
ADS.AddFailure(54436.8281748317, 1, 274)
ADS.AddFailure(65819.5877754221, 1, 438)
ADS.AddFailure(65919.5029949395, 1, 438)
ADS.AddFailure(46881.4260078973, 1, 438)
ADS.AddFailure(73214.3647378378, 1, 438)
ADS.AddFailure(89541.7683709142, 1, 190)
ADS.AddFailure(38978.5381681186, 1, 190)
ADS.AddFailure(42334.8989069159, 1, 190)
ADS.AddFailure(9596.18143252851, 1, 190)

Get the number of failures. In this example, number of failures will be 10. See FailureCount for additional details.

Dim FailureCount As Integer
FailureCount = ADS.FailureCount