30. A non-transitory installation medium storing instructions executable in an electronic device that provides a block diagram graphical environment for modeling a system, the non-transitory installation medium storing: one or more instructions for providing a first domain and a second domain within a block diagram model, the first domain comprising one or more nodes having a first function specifying parameters associated with the one or more nodes of the first domain, and the second domain comprising one or more nodes having a second function specifying parameters associated with the one or more nodes of the second domain, the parameters associated with the one or more nodes of the first domain or the parameters associated with the one or more nodes of the second domain specifying solver strategies or solver tolerances to be used in simulating the block diagram model; one or more instructions for providing a plurality of partitioning blocks for defining a first region and a second region of the block diagram model; one or more instructions for associating the first domain with the first region of the block diagram model; one or more instructions for associating the second domain with the second region of the block diagram model; and one or more instructions for passing parameters specific to the first domain to the associated first region of the block diagram model using the first function, not passing the parameters specific to the first domain to the second region of the block diagram model.
31. The non-transitory installation medium of claim 30 , wherein the plurality of partitioning blocks are manually configured to associate the first and second domains with the first and second respective regions of the block diagram model.