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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? Tip #7 Taguchi Method :When to Select a ‘larger’ OA to perform “Factorial Experiments” Friday, 1st June 2001
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
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)
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’
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
Taguchi Method :How to Select a ‘larger’ OA to perform “Factorial Experiments”
Taguchi Method :How to Select a ‘larger’ OA to perform “Factorial Experiments”
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
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
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
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
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