A processor for use in simulating operation of a portion of an electrical circuit is provided. The processor is configured to receive at least one input indicative of electrical circuit data related to the electrical circuit being simulated, generate a model of the electrical circuit based on the at least one input, receive a user input that indicates the portion of the electrical circuit to be simulated, generate, based on the user input and the electrical circuit model, a partial circuit snapshot that corresponds to the portion of the electrical circuit, and apply at least one event to the partial circuit snapshot to simulate operation of the corresponding portion of the electrical circuit.