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 aorist Lean 6 Sigma service business project - significant performance improvement in customer satisfaction (CSAT)

  • Dissatisfied customer in service process Problem
    Receiving poorer CSAT results.
  • listening to the voice of the customer (VOC) in service process using lean 6 sigma tools 1. We listened to customers
    To understand what really mattered.
  • building a lean 6 sigma fishbone diagram to understand causes of poor customer satisfaction in service process 2. We built the 'fishbone'
    To identify the most likely causes.
  • identifying systemic issues of customer dissatisfaction in service process using lean 6 sigma tools 3. We addressed systemic issues
    To remove them from the process.
  • measuring improvements in service satisfaction using lean 6 sigmna tools like control charts 4. We continued to measure
    To ensure changes were sustained.
  • 14% happer customers after application of lean 6 sigma to reduce service process issues Result
    CSAT increased by 14% in less than 6 months, in a business already known for having a good reputation with its customers. Businesses typically benefit from a 50 - 100+ times rate of return, when measuring the cost of an aorist Lean 6 Sigma or Lean training course and coaching against the benefits derived from applying it the very first time in their business.