I’ve been receiving several inquiries lately regarding the impact of the Partial Valve Stroke Test (PVST) interval on the failure rates of a final element. Specifically asking how does exSILentia® deal with this? exSILentia® allows users to specify if partial stroke testing is performed on their final…
exida explains Blog
Entries tagged with: Pfd
- by Iwan van Beurden, CFSE
- Wednesday, March 20, 2013
- Software
Changing the PVST Interval. Hey, my failure rates changed!
- by Dr. William Goble, CFSE
- Thursday, May 17, 2012
- Functional Safety
The Battle of the Failure Rates
Site Specific vs. Product Specific
During a field failure analysis study, it was discovered that the calculated failure rate of a specific device varied by more than 4X depending on installation site. Particularly, it was one specific site with a high failure rate. While any reliability engineer…