Following root cause analysis the team need to narrow down the many possible root causes to the significant few. This may involve using six sigma tools such as designed experiments [doe], auditing and hypothesis testing [amongst others]

1. Root cause verification
Lean and six sigma training course aid
Root cause verification: following brainstorming and root cause analysis it is necessary to
identify the significant few from the trivial many. Use six sigma tools such as designed
experiments [DOE], auditing, hypothesis tests to statistically prove that the possible root
cause is the real root cause.
www.leansixsigmatraining.net