Did you see my Changing the PVST Interval. Hey, my failure rates changed! post? There is more…
In addition to impacting the way the Partial Valve Stroke Test (PVST) is addressed in the SIL verification calculation, the PVST frequency…
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Entries tagged with: Sil 2
- by Iwan van Beurden, CFSE
- Thursday, March 21, 2013
- Software
Changing the PVST Interval. Hey, my Architectural Constraints changed!
- by John Yozallinas, CFSE
- Tuesday, June 21, 2011
- Certification
How does CMMI help my safety assessment?
We have CMMI processes at CL3; does that help us get IEC 61508 certification for SIL 3?
Companies that deliver a product or service do so by following a sequence of processes. High quality deliverables are a result of high quality processes and continuous improvement in…
- by Dave Butler, CFSE
- Friday, October 19, 2012
- Software
IEC 61508 Compliant Module Testing: Part 2
Last week you learned about what exactly a module is, and examples of different types of modules. Now we will move on to interfaces, the need for module testing, and code coverage requirements.
An interface, such as the 3D printer’s communication interface, or the format of the 3D data…
- by John Yozallinas, CFSE
- Thursday, April 14, 2011
- Certification
Stepping stones to SIL 3
Imagine. Marketing has just approached the engineering department and says your new safety product must have SIL 3 Capable certification instead of SIL 2 to be successful. You are in the engineering group developing this new product. Now what?
Let’s assume that the “change request” makes…