Why/When is Taguchi Method Appropriate?

1
Why/When is Taguchi Method Appropriate?

• A new tip Every Friday

Friday, 20th July 2001
2
Taguchi Method inner L18 array with outer
L4 and L9 NoIsE arrays (next 9 slides)
New Tip 14
Friday, 20th July 2001
3
inner L18 array with outer L4 and L9 NoIsE
arrays

• all 8 columns assigned
• ? Column 1 to a 2-Level Control Factor and
• all other columns to 3-Level Factors
  (3 slides)
• No need to keep any column empty
• ? To study interaction between
• Control Factors A and B
• assigned to columns 1 and 2
  (3 slides)
• Column 1,2 assigned
• ? to a single 6-Level Control Factor
  (3 slides)

4
L18 expt. with 2 Noise Factors (K, M)
(7B) Taguchi Method for QR L18 expt. with 2
noise factors
Measurements to Capture Noise
Control Factors
Expt.No.
A is a 2-level factor
and B-to-H are 3-level factors
5
L18 expt. With L4 Noise Array
Measurements to Capture Noise
(7) Taguchi Method for QR L9 expt. with 2
noise factors
L4 Array

N
Control Factors
M
K
K, M and N are noise factors with 2 level each, 4
combinations as per L4 Array are K1M1N1 ,
K1M2N2, K2M1N2 and K2M2N1
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L18 expt. With L9 Noise Array
(7) Taguchi Method for QR L9 expt. with 2
noise factors
L9 Array
Control Factors
Measurements to Capture NoIsE
K, M, N and P are noise factors with 3 level
each, 9 combinations as per L9 Array are used
for measurements 1 to 9
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(7B) Taguchi Method for QR L18 expt. with 2
noise factors
L18 expt. with 2 Noise Factors (K, M)
Measurements to Capture Noise
Control Factors
C
D
E
F
G
H
A x B can be studied
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L18 expt. With L4 Noise Array
Measurements to Capture Noise
(7) Taguchi Method for QR L9 expt. with 2
noise factors
L4 Array

N
Control Factors
M
K
C
D
E
F
G
H
K, M and N are noise factors with 2 level each, 4
combinations as per L4 Array are K1M1N1 ,
K1M2N2, K2M1N2 and K2M2N1
A x B can be studied
9
L18 expt. With L9 Noise Array
(7) Taguchi Method for QR L9 expt. with 2
noise factors
L9 Array
Control Factors
Measurements to Capture NoIsE
C
D
E
F
G
H
K, M, N and P are noise factors with 3 level
each, 9 combinations as per L9 Array are used
for measurements 1 to 9
A x B can be studied
10
(7B) Taguchi Method for QR L18 expt. with 2
noise factors
L18 expt. with 2 Noise Factors (K, M)
Measurements to Capture Noise
Control Factors
C
D
E
F
G
H
R is entirely a new Control Factor (consuming
columns 1,2 and 3). Even though it may be
constructed out of A and B, Interaction between
AXB can not be studied
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L18 expt. With L4 Noise Array
Measurements to Capture Noise
(7) Taguchi Method for QR L9 expt. with 2
noise factors
L4 Array

N
Control Factors
M
K
C
D
E
F
G
H
K, M and N are noise factors with 2 level each, 4
combinations as per L4 Array are K1M1N1 ,
K1M2N2, K2M1N2 and K2M2N1
R is a 6-Level Factor
12
L18 expt. With L9 Noise Array
(7) Taguchi Method for QR L9 expt. with 2
noise factors
L9 Array
Control Factors
Measurements to Capture NoIsE
C
D
E
F
G
H
K, M, N and P are noise factors with 3 level
each, 9 combinations as per L9 Array are used for
measurements 1 to 9
R is a 6-Level Factor
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More Tips Links below

• Friday, 3rd Aug 2001
• Friday, 27th July 2001
• Friday, 20th July 2001
• Friday, 13th July 2001

• Taguchi Method
• 1st Priority Variance Reduction 2nd 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 Taguchi Method not
  Appropriate?

Tips 12, 11, 10 ?
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More 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
• Taguchi Method
• Useful at ALL Life-stages of a Process or
  Product
• Taguchi Method
• Performs Process centering or fine tuning

Tips 9, 8, 7 ?
15
More 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 ?
16
More 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 ?
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More 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. Taguchis Signal-to-Noise Ratios are in Log
  form

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