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Obsolete Standards in WQS Prediction

Obsolete Standards in WQS Prediction

NSWC-2011 in has been available for a few years now but WQS Prediction still has 1998 models & data for "Mechanical Model". 1998 data and models are significantly modified or outdated. Credibility of predictions is severely impacted due to use of models already known outdated when an update has been available for a few years. I understand that it takes time to incorporate latest replacement models in WQS but a model lagging by many years essentially provides no value to the customers as the predictions have no credibility. Please consider including a warning message (pop-up window or otherwise) when the models have been replaced or outdated if they cannot be immediately updated. It would be nice if PTC software warns that the model may not be valid due to obsolescence when using the software or not include the obsolete models in the package when a direct replacement is already available.   Likewise, PRISM has been replaced by 217Plus but PTC WQS includes both models and an end-user might believe those two are different models or standards. MIL-HDBK-217F2 can stay even though it is old, as it is a competing model and it has no official replacement. But NSWC models, PRISM models and EPRD database have been officially updated.

3 Comments
rthomas-2
2-Guest

Hi,

just a comment:

If you use Mil-HDBK-217, consider applying ANSI/VITA 51.1 (2008).

Thomas

rthomas-2
2-Guest

another comment:

"Credibility of predictions is severely impacted due to use of models already known outdated when an update has been available for a few years."

That's a matter of opinion. There are some reasons for NOT using the latest edition of a standard. It really depends on the purpose of the reliability prediction.

Furthermore, the reliability analyst should always be aware of standards and their editions.

In particular Crane NSWC: There is virtually no market, so PTC gives it away for free. Updates are certainly not planned.

PTCModerator
Emeritus
Status changed to: Archived