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Why/When is Taguchi Method Appropriate?

Why/When is Taguchi Method Appropriate?. A new tip Every Friday. Friday, 29 th June 2001. Tip #11. Taguchi Method Useful at ALL Life-stages of a Process or Product (next 6 slides). Friday, 29 th June 2001. Taguchi Method Useful at ALL Life-stages of a Process or Product.

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Why/When is Taguchi Method Appropriate?

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  1. Why/When is Taguchi Method Appropriate? A new tip Every Friday Friday, 29th June 2001

  2. Tip #11 Taguchi Method Useful at ALL Life-stages of a Process or Product (next 6 slides) Friday, 29th June 2001

  3. Taguchi MethodUseful at ALL Life-stages of a Process or Product PRODUCT LIFE-STAGES are stage 1: Process Research & Development stage 2: Manufacture stage 3: Packaging stage 4: Storage stage 5: Transportation stage 6: Installation and Commissioning stage 7: Operation / use stage 8: Maintenance stage 9: Repair stage 10: Discard and Salvage

  4. Taguchi MethodUseful at ALL Life-stages of a Process or Product PRODUCT LIFE-STAGE #1 Process Research & Development • Taguchi Method is primarily a R&D development method for experimentally improving quality and for making the product ROBUST against NoIsE • This is done by conducting a matrix experiment in which several control parameters are varied in balanced manner and NoIsEis intentionally included during experimentation. • The resulting quality characteristics is measured and analysed to give  BEST CONTROL PARAMETER SETTINGS  to make the process insensitive to the NoIsE

  5. Taguchi MethodUseful at ALL Life-stages of a Process or Product PRODUCT LIFE-STAGE #2 Manufacture • All the variations that are likely to be encountered during manufacturing are included during the planned experiments. These variations could be in, • Equipment (used in production – variations in its parameters) • Raw materials (from different suppliers) • Manpower (skilled / unskilled with same level of training)

  6. Taguchi MethodUseful at ALL Life-stages of a Process or Product PRODUCT LIFE-STAGE #7 Operation / use • All the variations (usually environmental) that are likely to be encountered during operation and use are included during the product testing. These variations could be in, • Power supply (variations in voltage, frequency etc.) • Ambient (temperature, humidity, dust, rf interference) • Improper use (unskilled user, inadequate training)

  7. Taguchi MethodUseful at ALL Life-stages of a Process or Product PRODUCT LIFE-STAGE #9 Repair • All the variations that are likely to be encountered during long term use due to wear and tear are included during the product testing - for example test a product afterwear-and-tear, say 48 hours of continuous use at elevated temperature/humidity etc. • All the variations due to slow drifting of parameter values are included as NoIsE during the experiments itself (and products are made robust against the parameter that shows slow drift

  8. Taguchi Method 1st Priority : Variance Reduction2nd Priority : Factor Effects 15.“inner” L9 array with “outer” L4 and L9 NoIsE arrays Taguchi Method “inner” L18 array with “outer” L4 and L9 NoIsE arrays Taguchi Method Why/When is TaguchiMethod not Appropriate? Friday, 3rd Aug 2001 Friday, 27th July 2001 Friday, 20th July 2001 Friday, 13th July 2001 More Tips Links below Tips 12, 11, 10 

  9. Taguchi Method “inner” L8 array with “outer” L4 and L9 NoIsE arrays Taguchi Method Useful at ALL Life-stages of a Process or Product Taguchi Method Performs Process “centering” or “fine tuning” Friday, 6th July 2001 Friday, 29th June 2001 Friday, 22nd June 2001 More Tips Links below Tips 9, 8, 7 

  10. Taguchi Method Identifies the “right”NoIsEfactor(s) for Tolerance Design Taguchi Method Finds best settings to optimizeTWO quality characteristics Simultaneously 7. Taguchi Method When to select a ‘Larger’ OA to perform “Factorial Experiments” Friday, 15th June 2001 Friday, 8th June 2001 Friday, 1st June 2001 More Tips Links below Tips 6, 5, 4 

  11. Taguchi MethodUsing Orthogonal Arrays for Generating Balanced Combinations of NoIsE Factors Taguchi MethodSignal-to-Noise Ratio for Quality Characteristicsapproaching IDEAL value 4. Taguchi Methodimproves " quality “ at all the life stages atthe design stage itself Friday, 25th May 2001 Friday, 18th May 2001 Friday, 11th May 2001 More Tips Links below Tips 3, 2, 1 

  12. 3. Taguchi MethodAppropriate forConcurrent Engineering 2. Taguchi Methodcan studyInteraction between Noise Factors and Control Factors 1. Taguchi’sSignal-to-Noise Ratiosare inLog form Friday, 4th May 2001 Friday, 27th April 2001 Friday, 6th April 2001 More Tips Links below

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