Abstract

Kirk and Fred discuss misunderstandings of the limit testing and believing it’s “just breaking it”

Key Points

Join Kirk and Fred as they discuss what happens when there is not a common understanding of the using of empirical stress limits early in the development of a new product.
Topics include:

• Early prototypes and samples of a part may have some slightly different mechanical properties then the materials used in mass production, making testing with prototypes limited in understanding of the final product.
• The term “Failure” has a negative perception and a better term for finding the stress level of operational failure in a HALT (above design specifications) should be called a limit.
• When designing a new product, the design rules are based on physics of materials and mechanical loads. Design rules are the most fundamental application reliability by making sure the strength of the system exceeds the nominal or worst case end-use stress  conditions.

Enjoy an episode of Speaking of Reliability. Where you can join friends as they discuss reliability topics. Join us as we discuss topics ranging from design for reliability techniques to field data analysis approaches.

SOR 718 Dealing with HALT FearKirk Gray

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Show Notes

Please click on this link to access a relatively new analysis of traditional reliability prediction methods article from the US ARMY and CALCE titled  “Reliability Prediction – Continued Reliance on a Misleading Approach”

For more information on the newest discovery testing methodology here is a link to the book “Next Generation HALT and HASS: Robust design of Electronics and Systems” written by Kirk Gray and John Paschkewitz.