This page discusses:
To understand root cause analysis, you must define a root cause. A definition we developed in the 1980s is:
The most basic cause(s)
that can reasonably be identified and
that management has control to fix.
For a history of the definition of a root cause see:
Our most modern and current definition of a root cause is:
The absence of a best practice
or the failure to apply knowledge
that would have prevented the problem.
By this definition, root cause analysis is:
The systematic process of finding the
knowledge or best practice needed
to prevent a problem.
There are many methods to find root causes. Some say it can be as simple as asking “Why?” However, this is not a very systematic process and a committee developing an industry standard for root cause analysis decided that asking why did not meet the minimum requirement for being a recommended root cause analysis tool. What happens when your root cause analysis tool is “too simple”? CLICK HERE for an explanation of the problems you will experience.
What root cause analysis tools or methods should you use? Here is guidance to help you pick the root cause analysis system you should use:
If you have a system that guides you through the process outlined above and produces effective fixes, you will be well on your way to improving performance.
Having an effective root cause analysis system is just the start. You need to train the potential users (employees, supervisors, engineers, and managers) how to use the system. You should be careful to pick the best root cause analysis training. Training that helps incident investigators find the root causes of problems that they previously would have overlooked. Look for training that includes practical examples and allows the trainees to test the system using incidents from their facility/industry.
There are different types of root cause analysis training that your facility may need, including:
First, all employees that will be involved in investigations (either as part of an investigation team, as a facilitator, or as an interviewee) will need a basic understanding of the investigation process and tools. This helps them understand their role and the process’ focussed on finding fixable causes rather than placing blame. This training can usually be accomplished in a four to eight-hour root cause analysis introduction course.
Second, employees who will be performing basic investigations will need to know how to use the essential (minimum) root cause analysis tools to investigate simple incidents. This training can be accomplished in a two-day course.
Third, your investigators may need specialized training to conduct effective interviews, gather and preserve evidence, or troubleshoot equipment problems. This training can be combined with their basic training or be given as additional training to develop the investigator’s skills as they gain proficiency in the basic root cause analysis tools. This training can be designed to fit the employee’s needs and may take from four hours to several days depending on the amount of additional information provided.
Fourth, your facilitators (investigation experts) will need root cause analysis training to investigate major accidents. This will include in-depth knowledge of the root cause analysis tools, extensive practice, understanding of evidence collection techniques (including interviewing), understanding human error and equipment failure, and practice developing effective corrective actions. This training covers the basics plus the additional skills needed to handle the investigation of major accidents. This training will probably take about a week. Additional experience investigating precursor incidents is suggested before the investigator is assigned to facilitate a major accident investigation.
Finally, all investigators need to hone their skills after their initial training. This should include reviews of their root cause analyses by experience investigation experts to provide feedback. Also, consider continuing training to sharpen and advance their root cause analysis skills.
For information about root cause analysis training, CLICK HERE.
Modern root cause analysis systems have software to facilitate their use and make them more effective. The best root cause analysis software should:
For more on investigation and root cause analysis software, CLICK HERE.
As we mentioned in the section on root cause analysis training, investigators need feedback on the effectiveness of their investigations and corrective actions to continually improve their skills. This feedback will help investigators continuously improve their root cause analysis skills (instead of having their skills decay over time).
One way to provide this feedback is to grade their investigation using a systematic grading tool. The tool should follow the suggestions provided in the section on performing a root cause analysis. An example of a root cause analysis grading tool can be found by CLICKING HERE. Also, the grading tool is built into the TapRooT® VI Software (Versions 6.8 and beyond).
Root cause analysis data can help:
Many think that basic, linear graphing techniques are sufficient to provide effective root cause analysis trending. We have discovered that this isn’t true. Advanced trending techniques are needed to find trends in infrequently occurring safety data (and sometimes in quality, equipment reliability, human performance, and environmental incident data in high-reliability organizations).
What knowledge is required for advanced trending?
For more information about trending training, CLICK HERE.
We hope that this guidance on root cause analysis has helped you develop a road map to design the best incident investigations for safety, quality, equipment reliability, environmental, operational excellence, and human performance problems. Would you like our help analyzing and improving your root cause analysis program? Please contact us by CLICKING HERE. Also, we would be happy to help you learn to use root cause analysis proactively to improve performance before a major accident occurs.
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