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Why/When is Taguchi Method Appropriate?

Why/When is Taguchi Method Appropriate?. Tip #7 Taguchi Method : When to Select a ‘larger’ OA to perform “Factorial Experiments”. Friday, 1 st June 2001. Tip #7. Taguchi Method : When to Select a ‘larger’ OA to perform “Factorial Experiments”.

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Why/When is Taguchi Method Appropriate?

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  1. Why/When is Taguchi Method Appropriate? Tip #7 Taguchi Method :When to Select a ‘larger’ OA to perform “Factorial Experiments” Friday, 1st June 2001

  2. Tip #7 Taguchi Method :When to Select a ‘larger’ OA to perform “Factorial Experiments” • We always ‘think’ about ‘reducing’ the number of experiments (to minimize the ‘resources’ – equipment, materials, manpower and time) • However, doing ALL / Factorial experiments is a good idea if • Conducting experiments is ‘cheap/quick’ but measurements are ‘expensive/take too long’ • The experimental facility will NOT be available later to conduct the ‘verification’ experiment • We do NOT wish to conduct separate experiments for studying interactions between Control Factors

  3. Taguchi Method :When to perform ALL / “Factorial Experiments” • Conducting ALL / Factorial experiments is a good idea if • Conducting experiments is‘cheap’ (and in-house) but measurements are‘expensive’ (to be done elsewhere) • When an apparatus is fully set-up, it may be rather easy to conduct the experiments quickly (if we are not hampered by measurements in between the experiments) • Just collect all samples (that have ‘captured’ the effects of NoIsE factors) • Send samples (elsewhere) for measurements (make sure that these will capture the effects of NoIsE)

  4. Taguchi Method :When to perform ALL / “Factorial Experiments” • Conducting ALL / Factorial experiments is a good idea if • The experimental facility will NOT be available LATER to conduct the ‘verification’ experiment • A typical case when experiments are done • On Production equipment • On Borrowed equipment • In presence of visiting ‘experts’

  5. Taguchi Method :When to perform ALL / “Factorial Experiments” • Conducting ALL / Factorial experiments is a good idea if • We do NOT wish to conduct separate experiments for studying interactions between Control Factors • Analyze without considering interactions, Predict best combinations of control factors as well as Best results. Check this out – we already HAVE the results of the best experiment • If the results do not match, Evaluate the “key” interactions – again check results • If the results ‘still’ do not match, Evaluate “all” interactions – again check results

  6. Taguchi Method :How to Select a ‘larger’ OA to perform “Factorial Experiments”

  7. Taguchi Method :How to Select a ‘larger’ OA to perform “Factorial Experiments”

  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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