Abstract: A fault aware analog model (FAAM) system is disclosed. The FAAM system comprises a FAAM builder module comprising a model construction module configured to receive a reference dataset associated with a circuit block. The reference dataset comprises a set of data values that defines input to output relationship of the circuit block for both in spec and out of spec operation of the circuit block. The reference data set is derived based on data associated with a ground truth representation of the circuit block. In some embodiments, the model construction module is further configured to generate a FAAM comprising a behavioral model of the circuit block, based on the reference dataset, wherein the FAAM is configured to approximate the input to output relationship of the circuit block that is defined by the set of data values in the reference dataset.