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Review Scope and Chart Identification

Chart type and process identified

Verify the SPC chart type, process name, product or line, and review period are clearly identified.

Review period matches required frequency critical (required)

Confirm the chart review covers the required time window per SOP or control plan.

Yes No N/A

Inspector verified latest revision of control plan or SOP critical (required)

Confirm the chart is being reviewed against the current approved control plan, work instruction, or SOP.

Yes No N/A

Data source and sample size documented

Verify the chart includes the data source, subgroup size, and sample count used to generate the control chart.

Yes No N/A

Chart baseline or control limit setup is approved critical (required)

Confirm the baseline period and control limits were established using an approved method and are documented.

Yes No N/A

Control Limits and Data Integrity

Upper and lower control limits are displayed critical (required)

Verify UCL and LCL are visible on the chart where applicable.

Yes No N/A

Center line is displayed and correct critical (required)

Confirm the center line or process average is shown and matches the approved calculation.

Yes No N/A

Plotted data matches source records critical (required)

Verify plotted values match the source data or system record without transcription errors.

Yes No N/A

Missing data points or gaps explained

Confirm any missing points, skipped subgroups, or chart gaps are documented with a valid reason.

Yes No N/A

Measurement system or data collection issues noted

Check whether any gauge, sampling, or data-entry issues could affect chart validity and are documented as non-conformances if needed.

Yes No N/A

Trend and Rule Violation Review

No points beyond control limits critical (required)

Confirm there are no out-of-control points outside the UCL or LCL.

Yes No N/A

No sustained run or shift pattern detected critical (required)

Check for runs, shifts, or sequences indicating special-cause variation per the applicable SPC rule set.

Yes No N/A

No trend pattern detected critical (required)

Verify there is no sustained upward or downward trend that suggests process drift.

Yes No N/A

No rule violations under the applicable SPC rule set critical (required)

Confirm the chart does not violate the organization's defined SPC rules, such as Western Electric or Nelson rules, if used by procedure.

Yes No N/A

Process variation remains within expected common-cause behavior

Assess whether the chart indicates stable common-cause variation or whether special-cause investigation is required.

Note (optional)

Out-of-Control Signals and Investigation

Out-of-control signals identified and logged critical (required)

Record any points, patterns, or signals that triggered an out-of-control condition.

Yes No N/A

Immediate containment action taken critical (required)

Confirm affected product, lot, or process output was contained or segregated when a signal was found.

Yes No N/A

Root cause investigation initiated critical (required)

Verify a documented investigation was started for any special-cause event or repeated rule violation.

Yes No N/A

Investigation owner assigned

Confirm a responsible owner, department, or competent person is assigned to the investigation.

Disposition of affected product documented

Verify disposition decisions such as rework, scrap, hold, or release are documented for affected material.

Note (optional)

Corrective Actions and Effectiveness

Corrective action documented for each non-conformance critical (required)

Confirm each chart deficiency or special-cause event has a documented corrective action.

Yes No N/A

Due date assigned for corrective actions

Verify each corrective action has a target completion date.

Note (optional)

Effectiveness check completed or scheduled critical (required)

Confirm a follow-up review is completed or scheduled to verify the corrective action reduced recurrence.

Yes No N/A

Preventive action or process update required

Determine whether the control plan, sampling plan, training, or SOP needs updating to prevent recurrence.

Yes No N/A

Corrective action status

Record the current status of the action items associated with this review.

Note (optional)

Review Sign-Off

Overall chart review disposition critical (required)

Select whether the chart review passed, passed with observations, or failed.

Note (optional)

Inspector comments

Summarize key observations, rule violations, and follow-up needs.

Inspector signature critical (required)

Inspector or quality engineer sign-off confirming the review is complete.

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Run: SPC Control Chart Review

Review Scope and Chart Identification

Control Limits and Data Integrity

Trend and Rule Violation Review

Out-of-Control Signals and Investigation

Corrective Actions and Effectiveness

Review Sign-Off

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