9.6 Root Cause Analysis - Affinity Diagrams

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9 hours 3 minutes
Video Transcription
Hi, guys. Welcome to analyze phase root cause analysis. Affinity diagrams. I'm Catherine McKeever. And today you're going to get an awareness of affinity diagrams as a root cause analysis tool. This is the last of the three root cause analysis tools we will be looking at in this course.
So we have already reviewed the five wise
and the issue kala or the fish bone diagram. Now we're going to be looking at affinity diagrams.
So what you have in front of you is a completed affinity diagram. In order to come to complete an infinity diagram, you're going to want to bring your project group together with your sneeze on your subject matter experts and do a free form unstructured brainstorming
about what's causing this problem.
And when I say freeform, unstructured brainstorming, the way that I usually facilitate This is by having the group in front of us and giving them all a pad of sticky notes of post it notes and a pen and just say what's causing this problem?
Write down every single idea you have on a single posted new
and said it to the site and just keep writing until you think that you have no more ideas left so very, very freeform. We try not to have too much interaction with each other during these sessions because it does lead to group think. And then,
once you have done your brain storming,
the affinity part of this is going through all of those post it notes or those suggestions and grouping them in like groupings. So, for example, um, what's causing the problem we're going to look at on the left? The customer doesn't like the colors.
So what could cause that? Okay, well, the website designer is color blind. We've done no market research. We don't have a marketing department
lumping them together to create the branches of this. What looks like a mind map diagram.
So it is. It is free form. You're going to want to make sure that you write down everything that may be a factor and then organize it into major themes or ideas if there are in castle relationships. So if you have the
we don't like the colors because the website designer is color blind, you're going to want to link them together to create those branches,
much like with the other two. How we determine magnitude is driven by the number of different ideas that we have related to it. So remember, with the fish bone diagram we looked at. How many different the common things did we say under one of the branches of the fish bone diagram.
That's how we know the magnitude of the problem.
If we looked at our five wise, we're going to look at How deep can we go before we before we get to the bottom of our Why chain for an affinity diagram? It's going to be how many ideas are pulled together relating to those similar themes for our ideas of magnitude. And remember
when we talk about magnitude were talking about how big of an independent variable is this and how many different flavors that you can see when you do your root cause analysis.
So with that, affinity, diagrams are the least used of the root cause analysis tools, and it's because they're the most unstructured. So you see them more frequently, actually, in designed for six Sigma, which is when you are designing processes that are
six sigma from the outset. So right now we're working in a domestic project mindset which is based off of
the process, is already existing, and we're improving on them. Designed for Six Sigma, which is a black belt tool, is creating new processes. All of that being said, affinity diagrams tended to show up most there because you were brainstorming what ifs and magnitudes off as compared to looking at an existing process.
I particularly like affinity diagrams because I think that they allow for more creativity when you're looking at root causes. Because if you're just popping off everything that you think could be causing this, you may get some more of the out of the box ideas. However, much like with the fish bone diagram,
you don't necessarily get a deep dive into your underlying root causes. So that's where the strength and the five wise comes in.
Another thing I'm affinity diagrams that causes them to receive more criticism is that the magnitude can be swayed by the forefront of people's minds. So this is going to wrap us up for the root cause analysis tools that we're going to go over in this
course. Our next module is hypothesis development, so I will see you there
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