Organizations with quality manage ment systems compliant to ISO 9001:2008 are required to take action to eliminate the causes of nonconformities. Clause 8.5.2 defines Steps required for corrective action (CA), including determination of the nonconformity cause, along with determination and implementation of necessary action to prevent recurrence. Similar wording is also present in clause 8.5.3 regarding preventive action (PA). A cause of a nonconfonnance should coincide with a variation occurrence. With regard to this variation, is its source common cause or special cause? This question must be answered for proper cause identification because the answers may yield different resulting paths for CA. Determination of variability type is often absent from problem-solving methods, leading to ineffective actions.
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