Module 9 Introduction to Advanced Topics

Lesson M09-02

Text: Section 10

Duration: 38 minutes

Introduction to Quantitative ALT

Here we provide a brief introduction into the planning and analysis of quantitative Accelerated Life Tests. The goal is to estimate reliability at normal use conditions based on testing (some) units to failure at a set of higher stress conditions. By developing a model which relates failure times to the stress level(s), we may predict reliability at any stress condition (including the normal use conditions).

We review types of stress loadings and examples of the life/stress relationships as described by various models. An overall approach to analyzing ALT data is suggested and an example is provided.