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Why/When is Taguchi Method Appropriate?. Tip #3 Taguchi Method Appropriate for Concurrent Engineering. Friday, 4 th May 2001. Tip #3. Taguchi Method Appropriate for Concurrent Engineering (next 7 slides). Friday, 4 th May 2001. Noise Factors X. INTERNAL NOISE. EXTERNAL NOISES. - PowerPoint PPT Presentation
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Why/When is Taguchi Method Appropriate?
Friday, 4Friday, 4thth May 2001 May 2001
Tip #3Tip #3
Taguchi Method Appropriate for
Concurrent Engineering
Taguchi Method
Appropriate for Concurrent Engineering(next 7 slides)
Friday, 4th May 2001
Tip #3Tip #3
Taguchi Method P-Diagram with Internal/External noises
Friday, 4th May 2001
YProcess / Product
Diagram
Z
Control Factors
Noise Factors
XXINTERNAL NOISE EXTERNAL NOISES
Taguchi Method Effect of Internal/External noise on the output Y
Friday, 4th May 2001
Process / Product
Diagram
Z
Control Factors
Noise Factors
XX
Y
INTERNAL NOISE
EXTERNAL NOISES
VARIATIONS
Taguchi Method : Coupling 2 Process Stages
Process / Product
Stage #2
Z
Control Factors
Y2VARIATIONS
Process / Product
Stage #1
Z
Control Factors
Y1
VARIATIONS
• Variation in output of Stage #1 acts as NOISE input to Stage #2
• STAGE #1 itself is made insensitive to all noises, so that variations in its output Y1 are minimum
• STAGE #2 is made insensitive to variations in output of Stage #1
Taguchi Method Effect of Coupling 2 Process Stages on the output Y2
Process / Product
Stage #2
Z
Control Factors
Noise Factors
XX
Y2
INTERNAL NOISE
EXTERNAL NOISES
VARIATIONS
Process / Product
Stage #1
Z
Control Factors
Noise Factors
XX
Y1
INTERNAL NOISE
EXTERNAL NOISES
VARIATIONS
Taguchi Method : Coupling 2 ROBUSTROBUST Process Stages
• STAGE #1 DESIGN OBJECTIVE :
• Achieve insensitivity to all noises => min. variations in its output Y1
• Determine “adjustment factor” => to adjust level of Y1
• STAGE #2 DESIGN OBJECTIVE : • Achieve insensitivity to all noises including variations in Y1
=> min. variations in its output Y2
• Determine “adjustment factor” => to adjust level of Y2
• Determination of an “adjustment factor at each stage” • allows easy adjustment of output levels at a later time,
say during integration of stages, without affecting variationswithout affecting variations
IMPORTANT
• Main purpose of conducting matrix experiments (using Orthogonal Arrays) – to achieve insensitivity to noise by determining
the best settings of control factors – to identify the ‘adjustment factor’
• This is achieved by Taguchi’s 2-Steps– First step minimize variance– Second step to ‘adjust’ the mean-on-target
Earlier Tips Earlier Tips Links belowLinks below
15. Taguchi Method
““inner”inner” L9 array with “outer”“outer” L4 and L9 NoIsE arrays
14. Taguchi Method
““inner”inner” L18 array with “outer”“outer” L4 and L9 NoIsE arrays
13. Taguchi Method
Why/When is Taguchi Method not not Appropriate?
Friday, 27th July 2001
Friday, 20th July 2001
Friday, 13th July 2001
Tips 12, 11, 10 Tips 12, 11, 10
Earlier Tips Earlier Tips Links belowLinks below
12. Taguchi Method
““inner”inner” L8 array with
“outer”“outer” L4 and L9 NoIsE arrays
11. Taguchi Method
Useful at ALL Life-stagesALL Life-stages of a Process or Product
10. Taguchi MethodPerforms Process “centering”“centering” or “fine tuning”“fine tuning”
Friday, 6th July 2001
Friday, 29th June 2001
Friday, 22nd June 2001
Tips 9, 8, 7 Tips 9, 8, 7
Earlier Tips Earlier Tips Links belowLinks below
9. Taguchi Method
Identifies the “right” NNooIIssEE factor(s)
for Tolerance DesignTolerance Design
10. 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 Tips 6, 5, 4
Earlier Tips Earlier Tips Links belowLinks below
6. Taguchi Method Using Orthogonal Arrays for Generating Balanced Combinations of NoIsE Factors
5. Taguchi Method Signal-to-Noise Ratio for Quality Characteristics
approaching IDEAL valueapproaching IDEAL value
4. Taguchi Method improves " quality “ at all the life stages
at the design stage itselfthe design stage itself
Friday, 25th May 2001
Friday, 18th May 2001
Friday, 11th May 2001
Tips 3, 2, 1 Tips 3, 2, 1
Earlier Tips Earlier Tips Links belowLinks below
3. Taguchi Method Appropriate for Concurrent EngineeringConcurrent Engineering
2. Taguchi Method can study Interaction
between Noise Factors Noise Factors and Control Control FactorsFactors
1. Taguchi’s Signal-to-Noise RatiosSignal-to-Noise Ratios are in
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Friday, 4th May 2001
Friday, 27th April 2001
Friday, 6th April 2001
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