5 Principles of Problem Solving

There are five principles of problem-solving which is used to investigate and eliminate the root cause of non confirming parts.

What is the problem?

A condition characterized by a discrepancy between an ideal state and an actual state.

5 Principals for Problem Solving

1- Fact-finding and situation assessment

2-Identification of cause (why-why analysis)

3-Appropriate measures

4-Verification of the effectiveness of measures.

5-feedback to upstream sources

1-Fact Finding and situation assessment

  • Start Investigation immediately

  • Review the fact by 5W2H







7-How much/How many

  • Classify information into the process and actual problem part and analyze.

  • Classify information into the 4M based on result of the analysis , identify the primary cause of nonconformity.





2-Identify the cause (Why-Why analysis)

Work towards to identify the root cause by repeating "why" at least 5 times, investigate both causes of occurrence and cause of non-detection.

3-Appropriate measures

→ Determine measures deemed most effective for the identified root cause.

→Implement measures focusing more on the elimination of cause, rather than

prevention of outflows.

4-Verification of the effectiveness of measures

→Verify the effectiveness of measures with a reasonable number of units or time period, and confirm no recurrence of problems from the same cause.

→Verify both products and processes.

5-Feeback towards to upstream sources

Incorporate measures into the quality standards, organization, and management

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