I've got a process in which I want to allow for a 10% risk as a whole. I believe I can do this through MTBF MTTR, but in the Down Time I've apply a 10% or a 90% and it does not make any difference. See snapshot and model attached. What am I doing wrong?
It seems as if your model was build in Version 2019.1.1.
As the Name MTBF MTTR it gives the option to add a Time between failures and a down time (time to repair). So the field you are working in assumes a time. The option you chose gives the chance to say in 10% the time is 1 (and now you have to complete it and say what should happen in the rest 90%) between two failures!
But if you want a failure rate of 10 Percent you could do something like:
Uptime = 90
Downtime = 10
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