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Until recently, the electrical systems architecture that connects hardware devices and their accompanying control components were not separately a part of formal certification mandates. This changed with the advent of the FAR Part25 Subpart H EWISi (Electrical Wire Interconnection Systems) mandate. Interestingly this mandate, like certain others, does not impose specific solution. Instead it provides a structure that outlines what must be accomplished from a variety of perspectives - safety, signal separation, part selection, etc. The designer has some flexibility on which decisions to make, but those decisions can have significant cross-domain impact, which in turn, have influence on the intended product performance. What is needed is a method to design, verify and build virtually the entire electrical architecture with confidence that the best architecture is defined within the program constraints.