Taguchi Methods, Signal-to-noise Ratio from Quality EvaluationTo quality engineers, noise refers to any factor that alters a product's designated function. Signal-to-noise (S/N) ratios--commonly used to evaluate the quality of communications systems--can help keep this type of instability to a minimum in products and processes. This book illustrates various types of S/N ratios, using examples from mechanical, chemical, electrical, and measurement fields, and shows engineers how to use these ratios to evaluate quality and reliability of products and processes. |
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A1 and A2 analysis of variance ANOVA Table Appendix Table 1-2 Assignment and Results Calculation The S/N calibration equation columns Comparison Control factor decibel degrees of freedom density derivation effective divisor Equation Calibration error variance evaluation experiment Factor f factor level values Factors and Levels following equation GENICHI TAGUCHI given inner orthogonal array Input-Output Table intervals Japanese Standards Association linear effect linear equation M₁ measurement method multi-feed noise factors nominal-the-best characteristic number of data Number of levels Objective obtain the S/N optimal condition output parameter design point proportional equation quality engineering Ratio of A1 reference point calibration Reference Point Proportional S/N Ratio Calculation S/N Ratio Formulation seismic scale shown in Table signal factor level Taguchi Methods target value temperature three levels total variation total)2 transformed true value variability voltage y₁ zero point proportional