The certified six sigma green belt handbook, 2nd edition (1)
1. ASQ Quality Press
Milwaukee, Wisconsin
The Certified Six Sigma
Green Belt Handbook
Second Edition
Roderick A. Munro, Govindarajan Ramu,
and Daniel J. Zrymiak
3. Michael J. Cleary
Founder of PQ Systems, Inc.
Born June 3, 1939
Died suddenly on September 10, 2014
Dr. Cleary, a noted authority in the field of quality management and a charter
member of the Education Division of the American Society for Quality Control
(now ASQ), founded PQ Systems, Inc., in 1984, with headquarters in Dayton, Ohio,
later opening PQ Systems Europe Ltd., with sales in continental Europe and the
Middle East, and PQ Systems Pty Ltd. in Frankston, Australia, serving the Pacific
Rim. The company’s products help organizations demonstrate proof of the
quality
of their products and services using statistical methods and problem-solving tools.
PQ Systems was named among the top 25 best places to work in Dayton in 2014.
Cleary played a principal role in developing the Transformation of Ameri-
can Industry national training project, as well as the Total Quality Transforma-
tion training system. He served on the planning committee for the U.S.–Japanese
Business Conference in Tokyo, and presented papers on statistical process control
and the applications of quality management principles to a variety of audiences in
Korea, China, France, Great Britain, Australia, Singapore, and Japan. He was the
author of A Data Analysis Handbook: Using the SPSS System, as well as coeditor of
Practical Tools for Continuous Improvement, volumes 1 and 2.
As a professor of management science at Wright State University from 1971–
1996, Cleary was awarded the Business College Associates Alumni Teaching
Award. His 25-year professorship in management science enabled Cleary to con-
duct extensive research and garner valuable experience in expanding quality
management methods. He was a leader in bringing quality management into the
curriculum of the College of Business, and published articles and papers on issues
4. related to quality management, statistical applications, and decision sciences in a
variety of academic and professional journals.
Cleary is survived by his wife of 50 years, Barbara A. Cleary, PhD, and their four
sons: Sean (Katherine St. John), Timothy (Laura Jackson), Matthew (Liz
Hansen),
and Dennis (Karina Johansen), grandsons Michael Wyatt Cleary,
Harmon Hemp-
stead Cleary, Daniel St. John Cleary, and Victor Thomas Cleary, granddaugh-
ter Johanna Sol Cleary, sister Joan Buckman, brother-in-law John Rathman, and
nieces and nephews.
vi Dedication
10. List of Figures and Tables xxi
Figure 21.3 Average shifting, variation changing. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 379
Figure 21.4 Average stable, variation stable. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 380
Figure 21.5 An operating characteristic (OC) curve. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 382
Figure 21.6 X
–
and R control chart example with data plotted. . . . . . . . . . . . . . . . . . . . . . . 383
Figure 21.7 Rational subgrouping. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 387
Figure 21.8 Rational subgrouping with randomness. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 388
Figure 21.9 Measurement data entered in an X
–
and R control chart. . . . . . . . . . . . . . . . . 391
Figure 21.10 Completed X
–
and R control chart. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 392
Figure 21.11 Example of an X
–
and s control chart. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 393
Figure 21.12 Example of an individuals and moving range control chart. . . . . . . . . . . . . . 394
Figure 21.13 Example of a median control chart with associated range gage. . . . . . . . . . . 396
Figure 21.14 Example of a p-chart. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 398
Figure 21.15 Example of an np-chart. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 400
Figure 21.16 Example of a u-chart. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 401
Figure 21.17 Example of a c-chart. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 403
Figure 21.18 One point more than 3σ from the centerline (either side) . . . . . . . . . . . . . . . 406
Figure 21.19 Nine points in a row on the same side of the centerline . . . . . . . . . . . . . . . . . 406
Figure 21.20 Six points in a row all increasing or decreasing. . . . . . . . . . . . . . . . . . . . . . . . 407
Figure 21.21 Fourteen points in a row alternating up and down. . . . . . . . . . . . . . . . . . . . . 407
Figure 21.22 Two out of three points more than 2σ from the centerline (same side). . . . . 407
Figure 21.23 Four out of five points more than 1σ from the centerline (same side). . . . . . 408
Figure 21.24 Fifteen points in a row within 1σ of the centerline (either side). . . . . . . . . . . 408
Figure 21.25 Eight points in a row more than 1σ from the centerline (either side). . . . . . 408
Figure 21.26 Points beyond the control limits. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 409
Figure 21.27 Seven points in a row on one side of the average. . . . . . . . . . . . . . . . . . . . . . . 409
Figure 21.28 Seven points in a row that are consistently increasing or consistently
decreasing. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 409
Figure 21.29 Over 90 percent of plotted points are in the middle third of the
control limit region (for 25 or more subgroups). . . . . . . . . . . . . . . . . . . . . . . . 410
Figure 21.30 Fewer than 40 percent of the plotted points are in the middle third of
the control limit region (for 25 or more subgroups). . . . . . . . . . . . . . . . . . . . . 410
Figure 21.31 Obvious nonrandom patterns such as cycles. . . . . . . . . . . . . . . . . . . . . . . . . . . 410
Figure 22.1 A sample control plan template. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 415
Figure 22.2 An example control plan—first page. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 416
Figure 22.3 An example control plan—second page. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 417
Table 22.1 Process FMEA and control plan. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 420
Figure 23.1 The house of lean. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 434
Table 23.1 Lean Six Sigma tools. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 435
11. xxii
Preface to the ASQ
Certified Six Sigma Green
Belt Handbook, Second Edition
W
elcome to The Certified Six Sigma Green Belt Handbook, Second Edition.
This reference manual is designed to help those interested in passing the
American Society for Quality’s (ASQ) certification exam for Six Sigma
Green Belts and others who want a handy reference to the appropriate materials
needed to conduct successful Green Belt projects. This book is not intended as a
beginner’s Six Sigma Green Belt book, but a reference handbook on running proj-
ects for those who are already knowledgeable about process improvement and
variation reduction.
The primary layout of the handbook follows the American Society for Quality
Body of Knowledge (BoK) for the Certified Six Sigma Green Belt (CSSGB) updated
in 2014. The authors were involved with the first edition handbook, and have uti-
lized first edition user comments, numerous Six Sigma practitioners, and their
own personal knowledge gained through helping others prepare for exams to
bring together a handbook that we hope will be very beneficial to anyone seek-
ing to pass the ASQ or other Green Belt exams. In addition to the primary text, we
have added a number of new appendixes, an expanded acronym list (both print
[Appendix S] and electronic), new practice exam questions, and other additional
materials to the CD-ROM. Of special note on the CD-ROM are introductory Lean
video clips from the Gemba Academy (Appendix R) that should be very useful
in understanding applications of lean to your organization. The videos are from
each of the groupings that Gemba Academy uses in their business, and these can
be found on YouTube. Our CD-ROM contains clean, crisp MP4s of those videos for
better clarity. Another new feature of this handbook is the offer from PQ Systems,
Inc., that anyone who purchases this book can receive a free copy of the Quality
Gamebox software. Please see Appendix T for details on receiving your free copy.
The CD-ROM has been expanded into two disks, and a layout diagram is
available in Appendix R. Given that this is an electronic format, you are encour-
aged to search the files for any number of forms, examples, templates, videos, and
other useful tidbits that can help in running projects and preparing for the exam.
One caution—you are not allowed to take any of the exam questions from the
CD-ROM or any other simulation of questions into the ASQ exam!
Where Are You in Your Career?
As your professional career develops, you may wish to choose to use the tools
you have learned in advancing your own career. Some have called this career
12. Preface to the ASQ Certified Six Sigma Green Belt Handbook, Second Edition xxiii
AQP. Please see Appendix B to see how ASQ conducts exams to be able to advance
your career.
Level of
accomplishment
ASQ’s CQE,
CRE, CSQE,
CMQ/OE, CSSMBB
ASQ’s CQA, CHA, CBA,
CSSBB, CPGP
ASQ’s CSSGB, CCT
ASQ’s CSSYB, CQT, CQI, CQPA, CQIA
Changes to the BoK and Thus This Handbook
A detailed cross-matrix of the updated BoK and the original was developed by
Tom Kubiak and can be found in Appendix C.
Some of the highlighted changes include: The section on tools used in Six Sigma
has been moved from Chapter 9 in the first handbook to Chapter 7 to align with
the new BoK. We have also added an acronym list as Appendix U as well as a file
on the CD-ROM on disk one with hot links to some of the sources.
Other major changes to the 2015 CSSGB BoK include:
Content new to 2015 CSSGB BoK
BoK area Topic Subtopic Chapter Description Bloom’s Taxonomy
II E 2 8 Communication Apply
V B Root cause Analyze
analysis
V C 2 20 Cycle time Analyze
reduction
V C 3 20 Kaizen and Apply
kaizen blitz
VI C 1 23 Total productive Understand
maintenance
(TPM)
VI C 2 23 Visual factory Understand
13. Content eliminated from 2006 CSSGB BoK
BoK area Topic Subtopic Chapter Description Bloom’s Taxonomy
II A 5 4 Analyze Analyze
customer data
III B 1 11 Drawing valid Apply
statistical
conclusions
III F 6 15 Process Apply
capability for
attributes data
V C 20 Implement Create
and validate
solutions
xxiv Preface to the Certified Six Sigma Green Belt Handbook, Second Edition