1. An analysis method, comprising: accepting an input model of a real-world process defining a relationship between a plurality of parameters, including n input parameters which may be varied and at least one output parameter representing an aspect of an output of the real-world process, where n is a positive integer; defining a two-dimensional (2D) plane that is divided into a first plurality of regions corresponding to a subset of possible values of a first one of the input parameters, wherein each of the regions in the first plurality is further divided into a second plurality of regions corresponding to a subset of possible values for a second one of the input parameters; estimating a sensitivity of the at least one output parameter to the input parameters in a plurality of the regions locating at least one region where the at least one output parameter is substantially insensitive to variations in the input parameters; and wherein the accepting, defining, estimating, and locating are performed by at least one computer.