Thems that die’ll be the lucky ones.
~ Robert Louis Stevenson

This post is a continuation of the series “Is the HALT a Life Test or not?”

Test two samples and demonstrate reliability R=0,99 over a lifetime with CL=0,99. This is real. But what payment will we pay, besides the duration of the test on triple lifetime, which can be significantly accelerated by the way? [Read more…]

Meaning of Identifiers

K&R

HALT (Highly Accelerated Life Test). There is an opinion that “its name doesn’t do it justice”.

In the first Part “Is the HALT a Life Test or not?” we added the test time to the HALT stress set. We see there is the Life in HALT.

In Part 2 we added knowledge of the lifetime distribution type and a shape parameter (variation). We were able to evaluate the reliability during the warranty time with a given CL by “pulling the lifetime distribution by the tail”. We see HALT may be a quantitative Test. [Read more…]

In the first part “Is the HALT a Life Test or not?” we added the test time to the HALT stress set. What does this give us for lifetime evaluation when testing one or two samples? The correct answer is nothing. But if we add knowledge of the lifetime distribution type and a shape parameter (variation), then we can work with its tails [Read more…]

Sometimes shifting your perspective is more powerful than being smart.

Astro Teller

It is generally known that HALT testing means destroying a product with stepped stresses. Most experts agree that HALT doesn’t’ provide much information about life and the acronym of HALT (Highly Accelerated Life Test) is wrong. [Read more…]