Why/When is Taguchi Method Appropriate? A new tip Every Friday Friday, 29th June 2001
Tip #11 Taguchi Method Useful at ALL Life-stages of a Process or Product (next 6 slides) Friday, 29th June 2001
Taguchi Method Useful 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
Taguchi Method Useful 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 NoIsE is 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
Taguchi Method Useful 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)
Taguchi Method Useful 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)
Taguchi Method Useful 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 after wear-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
Earlier Tips Links below Friday, 27th July 2001 Friday, 20th July 2001 Friday, 13th July 2001 Taguchi Method “inner” L9 array with “outer” L4 and L9 NoIsE arrays “inner” L18 array with “outer” L4 and L9 NoIsE arrays Taguchi Method Why/When is Taguchi Method not Appropriate? Tips 12, 11, 10
Earlier Tips Links below Friday, 6th July 2001 Friday, 29th June 2001 Friday, 22nd June 2001 Taguchi Method “inner” L8 array with “outer” L4 and L9 NoIsE arrays Useful at ALL Life-stages of a Process or Product Performs Process “centering” or “fine tuning” Tips 9, 8, 7
Earlier Tips Links below Taguchi Method Identifies the “right” NoIsE factor(s) for Tolerance Design Taguchi Method Finds best settings to optimize TWO 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 Tips 6, 5, 4
Earlier Tips Links below Friday, 25th May 2001 Friday, 18th May 2001 Friday, 11th May 2001 Taguchi Method Using Orthogonal Arrays for Generating Balanced Combinations of NoIsE Factors Taguchi Method Signal-to-Noise Ratio for Quality Characteristics approaching IDEAL value 4. Taguchi Method improves " quality “ at all the life stages at the design stage itself Tips 3, 2, 1
Earlier Tips Links below Friday, 4th May 2001 Friday, 27th April 2001 Friday, 6th April 2001 3. Taguchi Method Appropriate for Concurrent Engineering 2. Taguchi Method can study Interaction between Noise Factors and Control Factors 1. Taguchi’s Signal-to-Noise Ratios are in Log form
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