fdeb83ab_t_PLM_software_ROI_calculation__How_to_use_it
[Calculation] Net savings / year [Description] Project savings for the analysis period, multiplied by the years in the analysis; the result is reduced by the project investment over the same period. [How to use it] 
Although simpler than NPV, total net savings is useful only for relatively short analysis periods with low-cost capital.
PDXpert PLM software ROI calculation