This white paper describes using exida’s Design expert Deviation and Mitigation Analysis (DexDMA) method with the OEMx tool to prepare a functional safety DFMEA and then perform the FMEDA for a complex part within a system. A 32-bit microcontroller such as those used on many functional safety applications is used as the example. OEMx allows for the entry of the product architecture with its internal sections, potential faults with deviations for each section, and mitigations for fault detection for each deviation.