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Run: SPC Control Chart Review

SPC Control Chart Review template for checking control limits, rule violations, and out-of-control signals before they become quality escapes. Use it to docu...

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Review Scope and Chart Identification

Verify the SPC chart type, process name, product or line, and review period are clearly identified.
Confirm the chart review covers the required time window per SOP or control plan.
Confirm the chart is being reviewed against the current approved control plan, work instruction, or SOP.
Verify the chart includes the data source, subgroup size, and sample count used to generate the control chart.
Confirm the baseline period and control limits were established using an approved method and are documented.

Control Limits and Data Integrity

Verify UCL and LCL are visible on the chart where applicable.
Confirm the center line or process average is shown and matches the approved calculation.
Verify plotted values match the source data or system record without transcription errors.
Confirm any missing points, skipped subgroups, or chart gaps are documented with a valid reason.
Check whether any gauge, sampling, or data-entry issues could affect chart validity and are documented as non-conformances if needed.

Trend and Rule Violation Review

Confirm there are no out-of-control points outside the UCL or LCL.
Check for runs, shifts, or sequences indicating special-cause variation per the applicable SPC rule set.
Verify there is no sustained upward or downward trend that suggests process drift.
Confirm the chart does not violate the organization's defined SPC rules, such as Western Electric or Nelson rules, if used by procedure.
Assess whether the chart indicates stable common-cause variation or whether special-cause investigation is required.

Out-of-Control Signals and Investigation

Record any points, patterns, or signals that triggered an out-of-control condition.
Confirm affected product, lot, or process output was contained or segregated when a signal was found.
Verify a documented investigation was started for any special-cause event or repeated rule violation.
Confirm a responsible owner, department, or competent person is assigned to the investigation.
Verify disposition decisions such as rework, scrap, hold, or release are documented for affected material.

Corrective Actions and Effectiveness

Confirm each chart deficiency or special-cause event has a documented corrective action.
Verify each corrective action has a target completion date.
Confirm a follow-up review is completed or scheduled to verify the corrective action reduced recurrence.
Determine whether the control plan, sampling plan, training, or SOP needs updating to prevent recurrence.
Record the current status of the action items associated with this review.

Review Sign-Off

Select whether the chart review passed, passed with observations, or failed.
Summarize key observations, rule violations, and follow-up needs.
Inspector or quality engineer sign-off confirming the review is complete.

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