1. A simulation apparatus comprising: a discrete events simulation processor configured to perform a discrete type simulation of a configured model comprising a plurality of different components based on attribute information associated with each of the plurality of different components of the configured model and based on connection information showing a connectional relationship among the plurality of different components of the configured model; a soft error rate computation processor configured to perform a soft error rate computation by: computing a soft error rate of the configured model as a whole comprising a combination of each of the plurality of different components based on a simulation result of the discrete events simulation processor, data on soft error rates in the attribute information, and by determining a relationship with a processing speed of each of the plurality of different components of the configured model; and computing a soft error rate of each of the plurality of different components separately; and a processor configured to: determine whether or not the configured model is redefined based on a processing performance computed at the discrete events simulation processor and the soft error rate computed at the soft error rate computation processor; and compute a model satisfying predetermined standards.