1. A computer-readable medium containing instructions executable by at least one processor, the computer-readable medium comprising: one or more instructions for providing an interface for defining a block diagram model representing a system; one or more instructions for receiving an input linearization point, an output linearization point, and an operating point; one or more instructions for linearizing the block diagram model based on the input linearization point, the output linearization point, and the operating point to form a linearized model; one or more instructions for analyzing a linearization result of at least one block of the block diagram model to determine contribution information of the at least one block toward a linearization result of the block diagram model; and one or more instructions for outputting information concerning a result of analyzing the linearization result.