One of the concepts in FMEA ( Failure Mode & Effect Analysis ) is the RPN (Risk Profile Number) which decides how to prioritize your actions for addressing those failures.
However, going by just severity, probability and effectiveness of control seems to leave out a vital component - SLI, e.g., there might be an issue that occurs moderately frequently, is moderate severity and moderate control effectiveness : that would make it 333 => RPN = 27. Let's also say that this failure leads to a downtime of 30 minutes ). Now Let's say that there is another failure mode that is RPN 15 (531) , but it takes 12 hours for it to be rectified. Going by the FMEA analysis, I would end up worrying more about the first one rather than the second.
How would I capture the availability bit here and how does RPN even relate to SLI ( if it even does )
