Design for Six Sigma

An Introduction to Design and Development

2http://www.qmss.biz Design for Six Sigma

Course Content

• Introduction• What is Six Sigma?• What is Design for Six Sigma (DfSS)?• Benefits of DfSS• DMADV• Tools• Deployment Structure• Summary• References

3http://www.qmss.biz Design for Six Sigma

Translate into CTQ’s

Customer Voice: “Fast Service!”

CTQ: Cycle Time

How to Measure: Time Client Requests To The Time Client Receives Service

Target/Limits: Goal of 3 days, with max upper limit of 5 days

4http://www.qmss.biz Design for Six Sigma

Measurement System Analysis

• Example: CTQ = Cell Phone Luminance– Ex: Take 2 technicians, using same photometer,

measure 4 cell phones (3 times each)– Study will:

• compare technicians to each other• Measure repeatability within each technician• Determine if overall measurement variation is acceptable

for this process and spec limits

Part-to-PartReprodRepeatGage R&R

100

50

0

Per

cent

% Contribution

% Study Var

% Tolerance

0.010

0.005

0.000

Sam

ple

Ran

ge

_R=0.00533

UCL=0.01216

LCL=0

Sue Tom

0.128

0.120

0.112Sam

ple

Mea

n

__X=0.11711

UCL=0.12099

LCL=0.11323

Sue Tom

MG4KRMG4JXMBGNV1G3D5Y

0.135

0.120

0.105

SN

TomSue

0.135

0.120

0.105

Operator

MG4KRMG4JXMBGNV1G3D5Y

0.128

0.120

0.112

SN

Ave

rage

Sue

Tom

Operator

Gage name: Date of study:

Reported by: Tolerance: Misc:

Components of Variation

R Chart by Operator

Xbar Chart by Operator

Luminance by SN

Luminance by Operator

Operator * SN Interaction

Gage R&R (ANOVA) for Luminance

5http://www.qmss.biz Design for Six Sigma

Roof of Correlation

INTERRELATIONSHIPS

TechnicalRequirements

ProductTargets

Cu

sto

me

rR

eq

uir

em

en

ts

ROOF

Pla

nn

ing

Ma

trix

NEGATIVE CORRELATION!“More Functions” is good, but

it will reduce “Battery Life”

How to resolve this contradiction? TRIZ!

6http://www.qmss.biz Design for Six Sigma

DOE Example

Send postcards during week, letters on weekend

INTERACTION PLOTS

DOE IS BEST TOOL TO TEST FOR INTERACTIONS!

Personalize the letter, not the postcard

7http://www.qmss.biz Design for Six Sigma

Helps identify shifts and trends

Machine Wear Problem

8http://www.qmss.biz Design for Six Sigma

Additional Resources

Quality Management Systems Solutionshttp://www.qmss.biz