We have some predefined set of tools that help in the Root
Cause Analysis. We choose the tool based on the problem that we encounter.
5 Whys – Mostly used with problems involving human factors
or interactions.
Barrier Analysis – Treats the problem as a barrier and tries
to remove the barrier.
Change Analysis – Mainly works on the Risk areas and tries
to expose the same.
Failure mode and effects analysis – Commonly used to
evaluate risk management priorities for mitigating known threat-vulnerabilities.
Fish-Bone Diagram or Ishikawa diagram or Cause and Effect
Diagram – The fishbone will help to visually display the many potential causes
for a specific problem or effect.
Pareto Analysis – A statistical technique in decision-making
that is used for selection of a limited number of tasks that produces
significant overall effects.
Fault Tree Analysis – Visual models showing the logical
relationships between the equipment failures, human errors and external events that
cause the problem.
