I am confused as to how to calculate MTBF. I am using a website called Polimore, http://www.polimore.com/index.php?P=1000110&F=home.html I input all of the subcomponents of my system and their MTBFs and then I get the MTBF for the system. The thing I am confused of is what to do if I am using more than one of the subcomponents. For example, I am using 5 of the same capacitor. Do I input this capacitor 5 times? Will this change the MTBF at all?