Methods for predicting electrical behavior in deteriorating induction machines are reviewed. The procedures require the assumption of a specific load speed, and the electrical operating parameters are calculated using models developed for this purpose. The approaches are general in that an arbitrary number of winding deterioration processes may be simulated on the stator and/or rotor. Forms of deterioration can include high or low impedance leakage between phases, between coils in a single phase, or between a phase and ground. Verification includes comparison with experimental data taken on motors that have been modeled as well as with data on motors that have not been specifically simulated. One application of this analysis is the generation of databases required to design and develop performance monitoring, deterioration detection, or deterioration classification systems for critical motor installations.