Contents

Introduction

• Modifications and Enhancements to ALTA 7

• How is this On-Line Reference Arranged?

• Contents

What is Accelerated Life Testing?

• Types of Accelerated Tests

• Quantitative Accelerated Life Tests

Understanding Accelerated Life Test Analysis

• Looking at a Single Constant Stress Accelerated Life Test

• Life Distribution and Life-Stress Models

• Analysis Method

• Stress Loading

• Summary of Accelerated Life Testing Analysis

Accelerated Life Testing and ALTA

• Data and Data Types

• Plots

Life Distributions

• Exponential Distribution

• Weibull Distribution

• Lognormal Distribution

Arrhenius Relationship

• Acceleration Factor

• Arrhenius-Exponential

• Arrhenius-Weibull

• Arrhenius-Lognormal

• Arrhenius Confidence Bounds

Eyring Relationship

• Eyring Acceleration Factor

• Eyring-Exponential

• Eyring-Weibull

• Eyring-Lognormal

• Generalized Eyring Relationship

• Generalized Eyring Acceleration Factor

• Generalized Eyring-Exponential

• Generalized Eyring-Weibull

• Generalized Eyring-Lognormal

• Eyring Confidence Bounds

Inverse Power Law Relationship

• IPL Acceleration Factor

• IPL-Exponential

• IPL-Weibull

• IPL-Lognormal

• IPL and the Coffin Manson Relationship

• IPL Confidence Bounds

Temperature-Humidity Relationship

• T-H Data

• T-H Acceleration Factor

• T-H Exponential

• T-H Weibull

• T-H Lognormal

• T-H Confidence Bounds

Temperature-Non Thermal Relationship

• T-NT Acceleration Factor

• T-NT Exponential

• T-NT Weibull

• T-NT Lognormal

• T-NT Confidence Bounds

Multivariable Relationships: General Log-Linear and Proportional Hazards

• General Log-Linear Relationship

• Proportional Hazards Model

• Indicator Variables

Time-Varying Stresses: The Cumulative Damage Model

• Cumulative Damage Power Relationship

• Cumulative Damage Arrhenius Relationship

• Cumulative Damage Exponential Relationship

• Cumulative Damage General Log-Linear Relationship

• Time-Varying Stress Model Confidence Intervals

Additional Tools

• Common Shape Parameter Likelihood Ration Test

• Tests of Comparison

• Degradation Analysis

• Accelerated Life Test Plans

General Examples using ALTA

• Paper Clip Example

• Electronic Devices Example

• Mechanical Components Example

• Tensile Component Example

• ACME Example

• Circuit Boards Example

• Electronic Components Example

• Voltage Stress Example

• Automotive Step-Stress Example

• Interval Data Example

Appendix A: Brief Statistical Background

• Basic Statistical Definitions

• Distributions

• Confidence Intervals (or Bounds)

• Confidence Limits Determination

Appendix B: Parameter Estimations

• Graphical Method

• MLE (Maximum Likelihood) Parameter Estimation

• MLE of Accelerated Life Data

• Analysis of Censored Data

• Appendix B Conclusions

Appendix C: References

See Also:
Introduction
How is this On-Line Reference Arranged?

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