Defined Environment

Speaking Of Reliability: Friends Discussing Reliability Engineering Topics | Warranty | Plant Maintenance

Defined Environment

Abstract

Kirk and Fred discuss that customers may use their products, such as washing machines, in more stressful environments than the design specifies or recommends.

Key Points

Join Kirk and Fred as they discuss manufacturers’ specified environmental conditions for use and the fact that most users probably do not know or follow those specifications.
Topics include:

• Some companies can record and transmit use and environmental conditions in real-time, which helps them understand the actual conditions rather than their design specifications.
• Many designers do not know what environments and usage conditions their customers will actually use it in, so they rely on standards that are generalized averages, not based on the actual wide variations in use conditions.
• Changes in technology have made many consumer products more robust, such as smartphones with more substantial glass screens, better water resistance, and more excellent reliability when accidentally dropped on the ground or water.
• Kirk has operated samples of business PCs that survived in thermal cycling and steady-state conditions well above the manufacturers’ specified temperatures for thousands of hours and wrote a paper, “Long Term Thermal Overstressing of Computers,” with Professor Michael Pecht, founder of the CALCE consortium. Here is a link to download this paper through IEEE Explore.

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.

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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”. It is in the public domain, so please distribute freely. Trying to predict reliability for development is a misleading a costly approach.

You can now purchase the most recent recording of Kirk Gray’s Hobbs Engineering 8 (two 4 hour sessions) hour Webinar “Rapid and Robust Reliability Development 2022 HALT & HASS Methodologies Online Seminar” from this link.

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.

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