Tagged: toyota

Hidden benefits of root cause analysis

Rebecca Hall

Time to read: 3 minutes

 
I recently watched the Movie ‘Christine’ starring Rebecca Hall (illustrated above).  Based on a true story, the movie deals with issues of being a misfit, living up to the expectations that we put on ourselves and coping with it all.
 
 
There are few scenes where we are able to gain an insight into the mind of the protagonist (Christine) as she tries to solve the problems and  dilemmas of life.
 
 
If you plan to watch the movie for yourself I would advise against googling ‘Christine Chubbick’ to avoid any spoilers.
 
 
 
Sock puppets 
Christine regularly visits a children’s hospital, and performs a sock puppet show.  She sometimes finds herself talking through her own problems via the sock puppets.  These are great scenes and its amazing to see how externalising problems helps in clarifying what’s bothering Christine.
 
 
 
The “Yes, but..” exercise
Another scene is where Christine is unknowingly coerced into an TA (Transaction Analysis) meeting. She partners up with a stranger and participates in a “Yes, but..” exercise.
 
You start by stating a problem: ‘My husband won’t paint the house’
 
The person listening would suggest a solution: What if you hired a painter’
If the suggestions isn’t appropriate then you have a chance to object: Yes, but i can’t afford a painter’
Another solution is suggestedWhat if you painted the house’
 
 
The format is repeated until you arrive at a solution that is suitable.  In most* cases solving the problem is completely within your control; we can make a decision or change our attitude without waiting for others to change.
*This statement is not always applicable;  as an example the character Christine suffered from a mental illness.
 
 
 
Root cause analysis
In business the equivalent tool we have is the 5 why’s.  The 5 why’s was developed within Toyota by Sakichi Toyoda.  It was used to advance their manufacturing process.  An example that may come straight out of Toyota:
 
The car wont start.
 
  1. Why =The battery is dead
  2. Why = The interior lights were left on for several days
  3. Why = The door sensor stopped working
  4. etc..
  5. etc..
 
 
 
Ancillary benefits
Further to finding the root cause of a problem or failure there are ancillary benefits of using an iterative process when solving a problem.  We are also able to easily identify and question Assumption and Logical Traps
 
 
Assumptions is something that we are all familiar with, but to use our earlier example,  when Christine used the sock puppets. it helped her to identify and question her own assumptions; the same can be said of the ‘Yes, but..’ exercise.
 
 
On the other hand logical traps are shortcuts that our brains uses in order to make decisions faster.  We do this by identifying patterns, making estimations and trying to make connections all in an effort to reduce the amount of effort that is needed to think.  Logic Traps are very useful and at the same time they can be misleading and inaccurate (hence why we use the 5 why’s)
 
 
 
Other points 
If you are using root cause analysis with a work setting, you may need to go through more than five iterations in order to find the root cause.  Furthermore you may find that there is more than one point of failure.
 
 
 
Conclusion
Self examination is a good exercise to go through and a great to skill to have.  It does take some level of courage to critic yourself and a level of self belief to know that in the end, you will be better for it.  In business prudence is shown when you decide to be proactive and not waiting for the next ‘major incident’ to initiate root cause analysis.
 
 
In both cases problems are easier to handle and solve when they are small and not screaming out at you.