Accelerated Life Test Designs

Designing Experiments for Accelerated Life Tests

Use the Accelerated Life Test (ALT) Design platform to design plans for accelerated life testing experiments. Product reliability at normal use conditions is often so high that the time required to test the product until it fails is prohibitive. Rather than test the product at normal use conditions, you can test the product under conditions that are more severe than normal use conditions. These severe conditions can cause the product to degrade faster and fail more quickly. You can then use this accelerated failure data to predict product reliability at normal use conditions.You can design initial experiments or augment existing experiments.

Figure 23.1 Profiler Showing Failure Probabilities for ALT Experiment 

Contents

Overview of Accelerated Life Test Designs

Example of an Accelerated Life Test Design

Build an Accelerated Life Test Design

Specify the ALT Acceleration Factors

Specify ALT Priors

Review and Update Specifications for ALT Plans

Create and Assess the ALT Design

Create ALT Design Tables

Accelerated Life Test Options

Additional Examples of Accelerated Life Test Designs

Example of Estimating Priors for an Accelerated Life Test Design

Example of Augmenting an Accelerated Life Test Design

Statistical Details for the ALT Design Platform

Failure Distributions for ALT Designs

R Precision Factor (for a 95% CI)

Optimality Criterion for Accelerated Life Tests