Application of a Rigorous Systems Engineering Process and Statistical Tools to the Definition and Solution of EMI Problems

A rigorous systems engineering process (SEP) was applied to investigate, define, and solve a widespread EMI problem that existed in the U.S. Fleet. Extensive problem definition led to the identification and char­ acterization of two separate and distinct interference mechanisms, involving multiple couplinggpaths and per­ formance degradation effects. Following problem definition, eight solution approachesrwere identified and assessed, from which viable potential solution al­ ternatives were developed and tested, and evaluated for their effectiveness. In what is believed to be a novel application of statistical regression analysis tools to EMI, a model was formulated to examine the correlation between in­ terference parameters. Solution effectiveness test results confirmed the results of the analytical approach, and enabled validation of its use as a general method whereby multiple interference coupling paths and degradation effects may be characterized and isolated, and their effects quantitatively correlat­ ed. As a predictive tool, the method would be useful in assessing the prospective effectiveness of EMI solution approaches based on empirical data. Overall, the paper describes the structure, operation, and demonstrated effectiveness of a formal SEP having a degree of rigor not ordinarily associated with EMI 'fixes'.