alt="Tip"/> Keep your eyes on the target to find tips and tricks we share to help you make the most of Lean Six Sigma.
Beyond This Book
In addition to the material in the print or e-book you’re reading right now, this book also comes with some access-anywhere goodies on the web. To view the free Cheat Sheet, go to www.dummies.com and type “Lean Six Sigma For Dummies Cheat Sheet” in the search box.
Where to Go From Here
In theory, when you read you begin with ABC, and when you sing you begin with doh-ray-me (thank you Julie Andrews). But with a For Dummies book, you can begin where you like. Each part and, indeed, each chapter is self-contained, which means you can start with whichever parts or chapters interest you the most.
That said, if you’re new to the topic, starting at the beginning makes sense. Either way, lots of cross-referencing throughout the book helps you to see how things fit together and put them in the right context.
Part 1
Understanding Lean Six Sigma
IN THIS PART …
Grasp the basics of Lean and Six Sigma.
Comprehend exactly what “sigma” means and why the term is important in Lean Six Sigma.
Get a clear picture of the synergy created by merging Lean and Six Sigma, and understand the key principles underpinning the approach.
Examine the process improvement method known as DMAIC: Define, Measure, Analyze, Improve, and Control.
Get ready to begin by defining the problems you want to solve using Lean Six Sigma.
Chapter 1
Defining Lean Six Sigma
IN THIS CHAPTER
Throughout this book, we cover the tools and techniques available to help you achieve real, sustainable improvement in your organization. In this chapter, we aim to move you down a path of different thinking that gets your improvement taste buds tingling. We look at the main principles behind Lean and Six Sigma and what today’s “Lean Six Sigma” is made up of. We’ll also introduce some of the main concepts and terminology to help you on your way.
Introducing Lean Thinking
Lean thinking focuses on enhancing value for the customer by improving and smoothing the process flow (covered in Chapter 11) and eliminating waste (discussed in Chapter 10). Lean thinking has evolved since Henry Ford’s first production line, and much of the development has been led by Toyota through the Toyota Production System (TPS). Toyota built on Ford’s production ideas, moving from high volume, low variety, to high variety, low volume.
Although Lean thinking is usually seen as being a manufacturing concept and application, many of the tools and techniques were originally developed in service organizations. These include, for example, spaghetti diagrams, and the visual system used by supermarkets to replenish shelves. Indeed, it was a supermarket that helped shape the thinking behind the Toyota Production System. During a tour to General Motors and Ford, Kiichiro Toyoda and Taiichi Ohno visited Piggly Wiggly, an American supermarket, and noticed Just in Time and kanban being applied. This innovation enabled Piggly Wiggly customers to “buy what they need at any time” and avoided the store holding excess stock.
Lean is called “Lean” not because things are stripped to the bone. Lean isn’t a recipe for your organization to slash its costs, although it will likely lead to reduced costs and better value for the customer. We trace the concept of the word “Lean” back to 1987, when John Krafcik (who later led Google’s self driving car project) was working as a researcher for MIT as part of the International Motor Vehicle Program. Krafcik needed a label for the TPS phenomenon that described what the system did. On a white board, he wrote the performance attributes of the Toyota system compared with traditional mass production. TPS:
Needed less human effort to design products and services.
Required less investment for a given amount of production capacity.
Created products with fewer delivered defects.
Used fewer suppliers.
Went from concept to launch, order to delivery and problem to repair in less time and with less human effort.
Needed less inventory at every process step.
Caused fewer employee injuries.
Krafcik commented:
It needs less of everything to create a given amount of value, so let’s call it Lean.
And just like that, Lean was born.
Bringing on the basics of Lean
Figure 1-1 shows the Toyota Production System, highlighting various tools and Japanese Lean thinking terms that we use throughout this book. In this chapter we provide some brief descriptions to introduce the Lean basics and the TPS.
