CI Tools

What is the fishbone diagram? Problem-solving using the cause and effect analysis to find the root cause.

Problem-solving is the process of finding a solution to a problem.  ASQ defines problem-solving as the act of defining a problem; determining the cause of the problem; identifying, prioritizing, and selecting alternatives for a solution; and implementing a solution.  It sounds complicated, and it is complicated.  After all, we are looking for an often-elusive solution for complicated and recurrent problems.

There are various problem-solving methodologies, PDCA, DMAIC, 8D, and others.  The effectiveness of all of them depends on the definition of the problem and finding its root cause.  Tools like fishbone analysis, or the 5 Why facilitates the process to find the root cause.

Today, I will focus on the tool commonly known as the fishbone diagram, but it is also known as Ishikawa Analysis or Cause & Effect diagram.  The diagram looks like a fishbone, with the problem description at the head and five categories as bones attached to the fish backbone.  The categories are the five M’s; material, manning or personnel, method or process, measurements, machine, or equipment.  Some people add a sixth category, environment, or mother nature.

The steps to complete the Ishikawa analysis are the following.

  1. Define the problem.
  2. Identify the major factors or categories, you can use your categories, or some of the general categories indicated above.
  3. Brainstorm possible causes with the team
  4. For each cause identified, continue to ask “why” that happens and attach that information as another bone of the category branch. You can see an example in the fishbone above, in the category machine.
  5. Construct the actual diagram
  6. Analyze to find the most basic causes of the problem, look for causes that appear repeatedly.
  7. Reach team consensus

The goal of RCA is to identify one or two reasons, that, if corrected will reduce recurrence.  The rule of thumb is that if there are three or more root causes, you can assume the root cause has not yet been found, and you need additional investigation.  In summary, keep digging!

CI Tools

Do you really want to go back to normal? Business as usual, will not going to cut it anymore.

These days you can hear the phrase when we go back to normal, dozens of times a day.  We all want to return to our normal lives, right?

As a lean practitioner, I believe that each event is a learning opportunity, the coronavirus pandemic is no different.  During these slower days, there is time to learn new things and plan for the future.  Lean is all about learning, experimenting, and adapting.  That is just what everybody needs to learn now.  Every day I read about how people are adapting to the new normal, and many are using lean or continuous improvement thinking without knowing it.  For me, at this moment, Lean style problem solving is the on-demand skill.

I am not the only one that thinks that way.  Last year, the Indiana Department of Workforce Development (DWD), published Indiana’s Employability Skills Benchmarks.  It describes a set of 18 workplace skills recommended for success in today’s competitive workforce.  One of the skills identified in the learning strategies category is problem-solving.  

The way each business adapts the operation to comply with the CDC guidelines is unique.   The solutions are not one-size-fits-all, and on top of that, those guidelines change as they gathered more information.   Learning how to use a systematic process like PDCA and apply lean thinking is critical to identify and implement the new operational guidelines for your business.  

This situation catches most people without the skills to learn and adapt, but it is never late to start.  You are on time to start using lean thinking to approach the current challenges.  With practice, you can build that muscle memory that will guide you through times like this.  The new normal then should be something better than before the coronavirus pandemic.  It is like when you create the future state value-stream-map, imagine a better and stronger business and plan how to make it happen!  Many will go back to business as usual, your competitive advantage will be your new way to do business.

Better Process Solutions can help you to start designing your new processes, get in touch!