practical applications for applying six sigma using minitab · title: basic quality tools author:...

1 Copyright SixSigma.us 2016

Peter Peterka

Global Six Sigma USA LP

Practical Applications for Applying Six

Sigma Using Minitab


Six Sigma & Minitab:

Legibility of Success

• 2015 Book Applying Six Sigma Using Minitab – Bruce

Gilbert and Peter Peterka

• The Six Sigma process improvement methodology

demonstrates the critical importance of properly

• Collecting and analyzing data. From its roots in

manufacturing environment, the power of Six Sigma

has

• Found its way into virtually all areas of business,

government and nonprofit entities. Individuals and

• Organizations everywhere are recognizing that they can

improve processes using Six Sigma. D

M

A

I

C


Peter Peterka, who I am, and why

did I get into Statistical Methods

Chemical Engineering ‘85

Dr. Deming MS in

Statistics or Equivalent ‘87

ISU Statistics ‘89

3M 1999-2000

The Six Sigma Call 98’



2001 Peter Peterka founded the company

Global Six Sigma USA LP (aka

SixSigma.us)

TODAY:

25 countries – geography of the company’s

activity

More than 5,000 companies became our

clients

More than 20,000 students



Company successfully implements Lean and Six

Sigma in various industries: • Agriculture

• Construction and Engineering

• Consulting

• Education

• Financial Services

• Governmental Services

• Healthcare and Hospitals

• HR Services

• Innovation and Technologies

• IT Systems and Technologies

• Logistics and Transportation

• Manufacturing

• Media

• Natural Resources – Energy

• Non-Commercial Organizations/Foundations



Company is an approved provider for educational

programs on Lean and Six Sigma by International

Organizations IACET® & PMI®, so the students can

earn PDU and CEU units.

PMI Registered Education Provider logo is a registered mark of the

Project Management Institute, Inc.


Support companies in solving problems with

unknown solutions to achieve the breakthrough

performance

OUR MISSION


Practical Advice and Tips for Effectively

Using Minitab

• How to introduce new users to Minitab including the best short cuts

a. Default 12 Bold FONT SIZE in Session Window

b. Atl M in session window to copy one column

c. Do it by hand first, create the building blocks and use automatic features.

d. The PEN http://epic-pen.com/

e. The Windows 10 magnifier

f. Do it four times, say it four times, be neighborly

g. Have click throughs and screen images on slides

h. Don’t skip steps in beginning classes. Students want everything to match 100%


How to Introduce New Users to Minitab

Including The Best Short Cuts

• Ctrl D

• Ctrl M

• Ctrl E

• The all famous F3

• If you don’t know what to do then click okay

• Use courier new font for Minitab Output

Dead

Sea

Scrolls

Show

Work

Sheets

Show

Graphs

Folder

Info Show

History

Report

Pad


Click-Throughs and Images

• In order to visualize the relationship of the X (Predictor)

to the Y (Response) variable use the Fitted Line Plot

Open worksheet Regress

Stat > Regression > Fitted Line Plot

Shear Strength (psi)

Age of Propellant (weeks)


Multi-Vari Data Analysis

• Investigate the performance of process Ys looking for sources of variation with three basic analysis steps:

• 1. PRACTICAL

Look at the raw data for abnormalities and errors

• 2. GRAPHICAL

Plot the data to get a visual sense of the data

Start with basic quality tools (from the first week)

• 3. ANALYTICAL

SPC and basic statistical tools are often used

Additional graphical and analytical tools will be covered throughout the remainder of this week


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Boxplot of Brightness

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Boxplot of Brightness

Hint: try right mouse clicking and then selecting panel and choose 1 row and 4 columns.

Hint: try right mouse clicking on box Add > Data Display > Individual Symbols.

How to Enhance Minitab Graphs


How to Enhance Minitab GraphsHint: Xbar Chart Options > Display > Check Box – Display control limits at all stages

Hint: Graph > Probability Plot > Distribution > Data Display > Uncheck Show Confidence .


Checking Stability, Shape, Spread and Centering

Minitab tools exercise: List all the Minitab tools

I-MR Control Chart

Normality Test

2 Variances or

Test for Equal Variance

Two Sample t-Test or

One Way ANOVA

Comparisons

involving 2 levels

of the X

Study Stability

Study Shape

Study Spread

Study Centering

Minitab roadmap - 2 samples


Organizing Graphs

• Layout Tool from Show Graphs Folder

• Layout Tool from Show Session


Sample Size Calculation vs Pareto Principle

• An Effect is average high minus average low

• Pareto vs. p-values

• Lenth’s theory has problems

• Eyeball method is better


P-value Disease for Design of Experiments

Factorial Regression: Yield versus Temp, Speed, Type

Analysis of Variance

Source DF Adj SS Adj MS F-Value P-Value

Model 7 1317.50 188.21 * *

Linear 3 1112.50 370.83 * *

Temp 1 1058.00 1058.00 * *

Speed 1 50.00 50.00 * *

Type 1 4.50 4.50 * *

2-Way Interactions 3 204.50 68.17 * *

Temp*Speed 1 4.50 4.50 * *

Temp*Type 1 200.00 200.00 * *

Speed*Type 1 0.00 0.00 * *

3-Way Interactions 1 0.50 0.50 * *

Temp*Speed*Type 1 0.50 0.50 * *

Error 0 * *

Total 7 1317.50


Vilfredo Pareto and the p-value in the Use of

Factorial Experiments

• The 80/20 works

• No need for Minitab sample size calculator

• Use the eyeball method first to reduce model.

Factorial Regression: Yield versus Temp, Speed, Type

Analysis of Variance

Source DF Adj SS Adj MS F-Value P-Value

Model 4 1312.50 328.13 196.88 0.001

Linear 3 1112.50 370.83 222.50 0.001

Temp 1 1058.00 1058.00 634.80 0.000

Speed 1 50.00 50.00 30.00 0.012

Type 1 4.50 4.50 2.70 0.199

2-Way Interactions 1 200.00 200.00 120.00 0.002

Temp*Type 1 200.00 200.00 120.00 0.002

Error 3 5.00 1.67

Total 7 1317.50


Ideas and suggestions for future

improvements for Minitab

• Lean Minitab out

• Add by variable to normal plot

• DOE – add cube plot to Factorial Plots, use Full Factorial by

default


Ideas and Suggestions for Future

Improvements for Minitab

Remember The power of Minitab in the information, graphic

organization and not the statistical power

Error proof it – DOE order should be full factorial – click-click if you

don’t know what to do click okay

Be consistent – some menus do the same function but different output

Improve the menu system not just the assistant

Not everyone is a statistician – model regression way-way to complex

button crazy

Character graphs having meaning – One Way

Get the cost down. Maybe a use by day or number of uses.

Have training companies evaluate new versions to learn how effect

training. Minitab is holding meetings how to confuse my students

Easy share function by email

Peter button – color button interquartile range

Shade the line of brushed data points


Thank you!Peter Peterka

[email protected]

512-415-3697

mailto:[email protected]


Notes

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