How to find PMHF value from safety goal dataset

Question

I have a requirement like to generate ID , Safety Goal , ASIL , Target Value and PMHF= F(T)/T for each safety goal. (as seen in below picture) . I am able to show first 4 column of value but not for PMHF= F(T)/T as it is not a part of a element of safety goal dataset but rest of all are.

It seems like hard to me for navigate from safety goals to FTA and its property PMHF .

Do we have any solution for how to get all required data in the table.

Thanks in advance.

medini_1023909254 · Answer

Hello,

I would strongly support Jan's second option and have everything as separate columns for safety goals already in medini (as derived properties). You may look up, how this is done in the ESL example or BestPractice template. There are a few reasons for this:

* Usually more than one FTA can be traced to a safety goal (e.g. quantitative FTA as well as qualitative) - so it must be made clear, which FTA is actually used for the PMHF calculation
* The PMHF value is obtained from a cutset-calculation, so you need to have the cutset stored in the FTA model - again in case of multiple stored calculations you need to make clear, which result shall be used

Best regards,

Eckhardt

medini_1024169437 · Answer

Hello,

the safety goal is "traced" with the FTA, that means there is simply a general purpose "Trace" relation between the two. One option is to create a separate data set for FTA (including the PMHF value) and IDs of all traced goals, then a joined dataset of goals and FTA using the goal ID as indicator.

Another option is to just script the missing piece in a custom column and use JS and normal medini operations like "mediniGetTracedElements" to navigate to the potential FTA.

Jan