IASSC Green Belt

Quick reference

• 00:04 Hello, I'm Ray Sheen.
• 00:06 If you're planning on taking the Green Belt exam, you'll need to be familiar with
• 00:10 all the topics in the Green Belt Body of Knowledge.
• 00:13 So let's take a look at what that entails.
• 00:16 Let's start with what we mean by a Body of Knowledge.
• 00:19 The IASSC Green Belt Body of Knowledge is a list of topics and
• 00:23 subject matter that a Lean Six Sigma Green Belt practitioner should know.
• 00:29 In the case of the IASSC Body of Knowledge, it is a list of topics, but
• 00:33 not all the details about those topics.
• 00:35 To understand the details you need a course like this, or
• 00:39 you need to study the books and writings that explain the topic.
• 00:43 Also, let me clarify for you that are not familiar with Lean Six Sigma belts,
• 00:48 the Green Belt role is for that of the Lean Six Sigma project team leader.
• 00:52 You don't have to be the subject matter expert on all of the Lean Six Sigma,
• 00:56 that is the Black Belt.
• 00:58 But you do need to understand all of the phases and
• 01:01 the basic tools of Lean Six Sigma.
• 01:03 Therefore the IASSC Green Belt exam tests
• 01:06 all five phases of a Lean Six Sigma project.
• 01:09 Define, Measure, Analyze, Improve and Control.
• 01:12 Several of the advance techniques in the Analyze and
• 01:15 Improve phase are reserved for Black Belt.
• 01:18 But you will need to know virtually all of the other tools and techniques.
• 01:22 And as I mentioned in the earlier session,
• 01:25 the IASSC Green Belt exam is 100 multiple choice questions and
• 01:29 true-false questions that address the Green Belt Body of Knowledge.
• 01:34 So let's look at each of the Lean Six Sigma project phases.
• 01:37 First, the Define phase.
• 01:39 The Body of Knowledge in this phase is both broad knowledge of Lean Six Sigma and
• 01:43 specifics on the Define phase.
• 01:45 So one aspect is the basics of Six Sigma.
• 01:48 The history and project management approach like roles, phases, and
• 01:52 deliverables.
• 01:53 And the fundamental aspect of problem solving, the Y = f(x) formula.
• 01:57 There are also a number of fundamental terms and
• 02:00 concepts in Six Sigma that are used over and over again.
• 02:03 Acronyms like CTQ, DPMO, Cost of Quality, and the Pareto principle.
• 02:09 Specifically, focusing on the Define phase, there are topics concerning
• 02:13 building a business case, creating a charter, and setting project metrics.
• 02:18 The last topic area in this phase is the Lean Enterprise.
• 02:22 For many in the Six Sigma community, Lean is an afterthought, or
• 02:25 a poor stepchild, to the Six Sigma statistics.
• 02:29 IASSC has made a conscious effort
• 02:31 to bring Lean principles into itsBody of Knowledge.
• 02:34 And many test questions will be related to Lean, in particular,
• 02:39 the seven elements of waste in 5S.
• 02:41 Onto the Measure phase.
• 02:43 In the Measure phase, we get down to the real problem.
• 02:46 And to do that, the Body of Knowledge includes a number of tools and
• 02:49 techniques for process and problem definition.
• 02:53 Things like cause and effect or a Fishbone diagram, process mapping, and
• 02:57 related topics like SIPOC and Value Stream Mapping.
• 03:00 This is also where IASSC introduces some basic statistical principles that
• 03:05 everyone doing process improvement work should know.
• 03:08 Things like normal distribution, the items of descriptive statistical analysis,
• 03:12 and graphical analysis.
• 03:14 Another very important area is measurement systems analysis,
• 03:18 these are the tools to make sure that your measurement system can be trusted.
• 03:21 We have an entire course on this topic and
• 03:23 if it's brand new to you I would recommend that you take it.
• 03:26 However, in this program, I'll introduce the topic and the key principles.
• 03:30 The final topic in this phase is process capability.
• 03:33 It is a statistical idea that's crucial for understanding your real problem.
• 03:37 It deals with process stability.
• 03:39 And you need to understand how it is determined both for variable and
• 03:44 discrete data.
• 03:45 Next is the Analyze phase.
• 03:47 In the Analyze phase, the team will analyze the data gathered in the Measure
• 03:51 phase to determine the root cause or causes.
• 03:54 One way to do that is to determine the distribution of the data.
• 03:58 Which means the pattern of variation.
• 04:00 Inferential statistics are another topic.
• 04:03 This means the statistical analysis of a sample of data
• 04:06 is used to infer the characteristics of all the data.
• 04:09 Needless to say, how the sample of data's selected and analyzed,
• 04:13 is a big part of this analysis.
• 04:16 Hypothesis testing is the approach used to statistically determine root cause.
• 04:21 There are many factors that influence the structure and
• 04:23 analysis of hypothesis tests.
• 04:25 We have an entire separate course on this subject because it is at the heart of much
• 04:29 of the statistical analysis of Lean Six Sigma.
• 04:32 The Green Belt Body of Knowledge focuses a segment on hypothesis testing with
• 04:36 normal data and another segment on non-normal data.
• 04:40 If you already know statistical analysis, you'll be familiar with all of these.
• 04:44 If you are not, you should take our hypothesis testing course
• 04:47 in order to become familiar with all of the tests and when to use them.
• 04:51 On to the improve phase.
• 04:53 For most, straight forward quality problems end with the Lean analysis,
• 04:56 the improve phase is very straight forward.
• 04:59 Eliminate the problem, or change the process to get the performance you want.
• 05:03 However, sometimes there are sticky problems that need more powerful
• 05:07 approaches.
• 05:08 One of these is the simple linear regression.
• 05:11 Don't let the term simple fool you.
• 05:13 In this approach,
• 05:14 you must discover the regression equation for how the system responds.
• 05:17 And then use that formula to set the system at the desired performance level.
• 05:22 An even more advanced approach is to use the multiple regression analysis.
• 05:26 This uses multiple factors to statistically predict the system
• 05:29 performance.
• 05:30 There are a number of considerations with this approach,
• 05:33 including residual analysis and confidence intervals.
• 05:36 We'll also spend some time in our hypothesis testing course
• 05:39 looking at this technique.
• 05:41 Finally, the control phase.
• 05:43 There are three topics for the control phase in the Green Belt Body of Knowledge.
• 05:47 One is Lean controls, like 5S, Kanban and Poke-Yoke.
• 05:52 The next is statistical process control.
• 05:54 Unlike hypothesis testing, where statistics were used to determine root
• 05:58 cause, this is an approach that is used to determine to whether the process is
• 06:02 continuing to perform as designed and expected.
• 06:05 It relies on a control chart.
• 06:06 Different charts are used depending upon the characteristics of the data.
• 06:10 We'll introduce this topic of statistical control and
• 06:13 control charting in this course.
• 06:15 But if it is new to you, I strongly recommend you take our stand alone course
• 06:19 on statistical process control.
• 06:21 The final topic is Six Sigma control plans and
• 06:23 response plans along with the final cost benefit analysis.
• 06:29 The Green Belt Body of Knowledge contains all the tools and
• 06:32 techniques that are normally needed when leading a Lean Six Sigma project.
• 06:37 And now, not every project will use every tool.
• 06:40 But these set is considered the basic set that all Green Belts should know.
• 06:46 Make sure you know these before you sit for the exam.

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