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The components with the highest calculated failure rate in the VIPer807 reliability
prediction are: the 486 CPU, the Sequoia chipset (PT86C718) and the chip set
(PT86C768).
The quality factors for commercial components on the VIPer807 has been adjusted in
order to represent the impact of burn-in. TEKNOR submits each processor board produced
to a 12 hour burn-in at 40°C. The boards are powered during this phase to precipitate
latent failures. It is well known that a burn-in performed under these conditions improves
board and component quality. Since there is a correlation between quality and reliability,
it is generally accepted in the industry to reflect this in the reliability prediction.
VIPer807 Specifications
A-5
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