Taguchi presentation

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Taguchi presentation

  1. 1. Taguchi Method Presented by: Bobby Wyrwa Dr. Genichi Taguchi IE672-852 Professor Bernier 4/25/12
  2. 2. Electrical Communication LaboratoriesMurry Hill, New Jersey Tokyo, Japan Dr. Taguchi – Head of R&D Productivity and Product Quality
  3. 3. ConceptsQuality should be designed into the product andnot inspected into itQuality is best achieved by minimizing thedeviation from the targetThe cost of quality should be measured as afunction of deviation from the standard and thelosses should be measured system-wide
  4. 4. Quality Designed Into the ProductQuality improvement begins at the designstageContinues through to the production stageInspection, screening, or salvaging doesnot improve poor qualityQuality should be based on the philosophyof prevention.
  5. 5. Minimizing Deviation From the TargetQuality is directly related to the deviation of adesign parameter from the target valueProperties skewed toward one end of anacceptance range yet show a shorter lifeexpectancy– Step 1: Specify a target value– Step 2: Develop manufacturing process to meet target value
  6. 6. Quality As a Function of DeviationMeasuring deviations from a given designparameter in terms of the overall life cyclecosts of the productScrap, rework, inspections, returns, orproduct replacement
  7. 7. Limitations of Quality ControlThe need for timing with respect toproduct/process developmentTechniques MUST be applied in the earlystages of the designTaguchi method may not always apply
  8. 8. Design Parameters for Reduced VariationReducing the variation around the target– Easier to attain qualityHighly used for industrial settingsLow cost solutions can be found byadjusting the levels and controlling thevariation of OTHER factorsCost savings exceed the cost of additionalexperiments
  9. 9. Example Process objective: Economicmanufacturing of high quality (color,size, …) tiles Problem: Uneven size due totemperature variation in kiln Traditional approach: Redesign kiln formore even temperature distribution($.5M investment with no guarantee) Robust design approach: Find a setproduct or process design parametersthat makes the size insensitive totemperature variation Solution: Increase lime content from1% to 5% in clay
  10. 10. Thank YouQuestions and Comments via Moodle

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