12. SN Ratios for Continuous Variables

  1. Dr. Genichi Taguchi engineering Executive Director Honorary Member,
  2. Dr. Subir Chowdhury aerospace engineering, industrial management chairman CEO world leader strategist author honorary member honorary doctorate and
  3. Yuin Wu B.S. in chemical engineering professor Executive Director consultant

Published Online: 26 NOV 2007

DOI: 10.1002/9780470258354.ch12

Taguchi's Quality Engineering Handbook

Taguchi's Quality Engineering Handbook

How to Cite

Taguchi, G., Chowdhury, S. and Wu, Y. (2004) SN Ratios for Continuous Variables, in Taguchi's Quality Engineering Handbook, John Wiley & Sons, Inc., Hoboken, NJ, USA. doi: 10.1002/9780470258354.ch12

Author Information

  1. American Supplier Institute (ASI), USA

Publication History

  1. Published Online: 26 NOV 2007
  2. Published Print: 22 OCT 2004

ISBN Information

Print ISBN: 9780471413349

Online ISBN: 9780470258354



  • zero-point proportional equation;
  • reference-point calibration;
  • signal factor level;
  • concurrent or simultaneous engineering;
  • split analysis


This chapter contains sections titled:

  • Introduction

  • Zero-Point Proportional Equation

  • Reference-Point Proportional Equation

  • Linear Equation

  • Linear Equation Using a Tabular Display of the Orthogonal Polynomial Equation

  • When the Signal Factor Level Interval Is Known

  • When Signal Factor Levels Can Be Set Up

  • When the Signal Factor Level Ratio Is Known

  • When the True Values of Signal Factor Levels Are Unknown

  • When There Is No Signal Factor (Nondynamic SN Ratio)

  • Estimation of Error

  • Double Signals

  • Split Analysis: When There Is No Noise

  • References