Abstract: Computational requirements are reduced for executing simulation code for a logic circuit design having at least some elements which are synchronously clocked by multiple phase clock signals, the simulation code including data structures associated with circuit modules and nodes interconnecting the circuit modules. The simulation code is preanalyzed and phase waveforms are stored each representing values occurring at a node in successive phases. Based on the preanalysis, modules are categorized in a first category, for which an event-based evaluation is to be performed in each phase of the simulation, and a second category for which no event-based evaluation need be performed in at least one but not all phases. For each phase of a second category module, an appropriate response to an event occurring with respect to the module is determined.

Abstract: A simulation method allowing an experimenter to model a real-world situation in order to learn something about it. The method permits interaction of concurrent experiments through interaction between different variables during a single simulation run on a computer having at least one central processing unit.

Abstract: A simulation method allowing an experimenter to test and debug computer programs concurrently. The method ultilizes the generation of signatures to observe interactions of various subprogram paths with a reference case.