The actual stress values may be provided in multiple reliability prediction method.

Stress group box with values appears on the reliability prediction method data screen for these methods - see MIL-STD-217 for Capacitor for example:

See the full list of available stress parameters for different components in the Stress of Product Tree Chapter.

RAM Commander computes stress ratios for passive components such as resistors and capacitors.

There are three fields used in computing stress ratios: ratio itself, applied value, and rated value.

For example for the capacitor it is:

 

If you enter a value for VSR, RAM Commander uses it to compute stress ratios using the formulas in MIL-HDBK-217 F. If VSR has no value, RAM Commander computes it using the formula:

 VSR = Vapl (User)  / Vrat(User)

Formulas for power stress ratio (PSR) and capacitance stress ratio (CSR) are similar.