Using Empirical Reliability Tools to Estimate the Effect of HASS on Product Field Life

Summary:
 
Qualmark is often asked by those new to HALT and HASS test techniques, “how do I know that I am not damaging the field life of my product by performing HASS on my production units”?

The simple answer is, the stress levels for HASS are determined by appropriately guard-banding HASS screens based on the results of HALT. A Proof of Screen (PoS)is first perfomed to confirm the stresses that can be safely applied to production units without over-stressing good products, while still detecting latent defects in marginal products.

This paper provides a deeper discussion for determinig the effects of HASS on product field life.