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5 Why Analysis


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5 Why Analysis

  1. 1. 5 Why Analysis By, Amit Shrivastava Hyderabad, India.
  2. 2. Why 5 Why ? To find the…….
  3. 3. When to Use 5 Why  Complaint from the Client  Observation from the Client  Recurring Errors  First Time Quality  Internal Quality Issue  Quality System Audit Non-conformances
  4. 4. 5 Why Analysis  A cross-functional team should be used to solve the problem  Don’t jump to conclusions or assume the answer is obvious  Don’t be bias  Be absolutely objective
  5. 5. General Guidelines  Ask “Why” until the root cause is uncovered  It may be more or less than 5 Whys  If words like “because” or “due to” are coming in the answer, move to the next Why  If you don’t ask enough “Whys”, you may end up with a “symptom” and not “root cause”
  6. 6. General Guidelines (Contd…..)  Corrective action for a symptom is not effective in eliminating the cause – Corrective action for a symptom is usually “detective” – Corrective action for a root cause can be “preventive”
  7. 7. Example:
  8. 8. Criticism of 5 Why:  We generally stop at symptoms rather than going on to lower-level root causes  Lack of support to help the investigator ask the right "why" questions  Getting right answer for the "why"  Different people using 5 Whys, come up with different causes for the same problem
  9. 9. Criticism of 5 Why (Contd…..)  Tendency to isolate a single root cause, whereas each question could elicit many different root causes
  10. 10. Solution: Verify the answer to the current "why" question before proceeding to the next.