• Common cause
• Comparative analysis
• Containment action
• Contributing cause
• Control chart
• Corrective action

• Common cause

Sources

- 8D Training by Axsens bte.

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• Comparative analysis

    Allows identifying at which date differences appeared, or when changes - process, staff, design, etc - were introduced, possibly to have generated the issue.

Useful links: “Rootcause analysis and problem solving” by IAQG.

Sources

- "Rootcause analysis and problem solving" by IAQG.

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• Containment action

    It is the action to mitigate impact of the problem and protect the operations/customers (stop the problem getting worse). Includes correction, immediate corrective action, immediate communication and verification that problem does not degrade.

   It is a statistical tool used to distinguish between variation in a process resulting from common cause, and special cause. As a graphic display of the process stability or instability over time, it highlights statistical control limits, not specification or tolerance.

    Why using a Control Chart?
        • To make judgements of the process performance over a certain period of time
        • To assess the effectiveness of changes to improve a process

Useful links: “Rootcause analysis and problem solving” by IAQG. 

Sources

- "Rootcause analysis and problem solving" by IAQG.

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• Corrective action

    It is the action taken to fix the cause of the nonconformity and to prevent recurrence.

Useful links: “Rootcause analysis and problem solving” by IAQG.

Sources

- "Rootcauseanalysis and problem solving" by IAQG.

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