Proving root cause of failure in 6 Sigma to guarantee improvement

  • 1
    Identify possible causes.
    Identify all the likely causes of the problem (e.g. poor training, insufficient resources, etc.) and rank them in sequence of likelihood.
  • 2
    Relate causes to the problem.
    Gather data about the most likely causes (e.g. do defects rise as volume of work rises, etc.), and use it to compare to the problem.
  • 3
    'Prove' causes using simple statistical methods.
    Correlate the 'hypothesised' causes to the problem to identify and demonstrate causal linkage. Acting on proven causal links guarantees significant improvement.


aorist Service Lean 6 Sigma

Achieve step-change improvement in the processes in your service business to get the results you need.

Effective step-change process improvement, defect removal and variation reduction is critical to successfully increasing output and reducing costs in complex and inter-dependent service processes. Through our years of experience in helping clients achieve step-change improvements to their processes, we can help you increase output and reduce costs in your business.

Example Lean 6 Sigma service business project - step-change performance improvement in reducing broken promises to customers