We will sum up 5 root cause analysis methodologies.
- 5 whys
What does five whys mean? The 5 Whys Root Cause Analysis is a system for understanding the cause-and-effect relationships that create our business and organizational problems. It’ll help you drill down to the core of the problem, make the connections less abstract and more tangible, and see how you can take steps to address it.
How does it work? Here’s an example: Alice has a problem with her coffee maker and wants answers about how to fix it. She goes through each step – whatever was last done on her machine – until she reaches the root of the issue. Why did I have this problem in particular? To find out, she reflects on all her operations over time with regard to coffee machines until she
- Fault Tree Analysis
A fault tree analysis is a diagram of faults and faults causes, where the faults are represented as boxes and the faults causes as lines. Just about any event can be considered a possible fault, but some common ones include malfunctions as well as mistakes made by humans or systems. The purpose of this analysis is to determine, after looking at just about anything that might have gone wrong with the process, what set of specifically related events led to an incident or accident taking place.
<Fault Tree Analysis Diagram>
Root cause method is mostly used for accidents and not for planned operations (set-ups). For example: Software installation Cause: Human error during software installation Deployment errors Cause: Hardware malfunctioning During system initialization
- Fishbone Diagram
Fishbone diagrams are a graphical means for understanding all the possible causes of a problem, with each possible cause being represented as a “spine.”The name is derived from the visual similarity between these diagrams to fish skeletons.
- Barrier Analysis
- Storytelling method