[chbot] Chchrobotics Digest, Vol 157, Issue 11

Helmut Walle helmut.walle at gmail.com
Sun Oct 18 09:12:31 BST 2020

A word of caution regarding that reference: the use case here, I believe, was about items that
have just been produced and do or do not meet the factory's specification limits, i.e., items
that fail a production test.

However, that reference below is about product reliability, where the scenario is that a number
of units are operating, and that there will be age-related failures within that operational
asset base over time. In both cases statistical methods are used, but for different reasons, and
the mathematics are not the same.

Kind regards,


On 18/10/2020 21:04, Bevin Brett wrote:
> https://www.weibull.com/pubs/2015_RAMS_right_sample_size.pdf
> <https://www.weibull.com/pubs/2015_RAMS_right_sample_size.pdf> seems to be in the right ballpark
> /Bevin
> 2015 Reliability and Maintainability Symposium
> <https://www.weibull.com/pubs/2015_RAMS_right_sample_size.pdf>
> Athanasios Gerokostopoulos is a Reliability Engineer at ReliaSoft Corporation. He is involved in
> the development of ReliaSoft’s software products and the delivery of training seminars and
> consulting projects in the field of Reliability and Quality
> www.weibull.com
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