1. A system for coupling multiple finite element analysis (FEA) analyses of an entity that has two or more levels of organization, the system comprising: an instance set of the FEA analyses simulating the entity, the instance set comprising: a first-level instance configured to use a first-level model of a first one of the two or more levels of organization; and one or more second-level instances configured to use one or more second-level models of a second one of the two or more levels of organization; a controller module configured to: generate at least one of the first-level instance or the one or more second-level instances of the instance set; communicate with the instance set to control a progression of the simulation; and output result data based on the simulation at least at an end of the progression of the simulation; one or more computers; wherein: the one or more second-level instances are configured to use information about the first-level instance to analyze at least a portion of the second one of the two or more levels of organization based on at least one of the one or more second-level models; the first-level instance is configured to use information about the one or more second-level instances to analyze at least a portion of the first one of the two or more levels of organization based on the first-level model; the information about the first-level instance and the information about the one or more second-level instances are updated through the progression of the simulation; and the instance set and the controller module are configured to be executed by at least one of the one or more computers.