Process Capability Study Checklist

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Planning & Scope Definition

1 of 6

Ensures the study is properly planned and the scope is clearly defined to ensure relevant data is collected and analyzed.

Process Name

Process Description

Study Objective

Sample Size (Planned)

Study Start Date

Specification Limits (USL, LSL)

Critical to Quality (CTQ) Attribute?

Potential Sources of Variation

Data Collection & Preparation

2 of 6

Focuses on the collection and initial preparation of data, including sampling methods and data cleaning.

Sample Size (n)

Sampling Method

Rationale for Sample Size

Data Collection Start Date

Data Collection End Date

Number of Subgroups (if applicable)

Data Points/Variables Measured

Detailed Description of Measurement System & Equipment Used

Description of any Data Cleaning Steps Performed (e.g., outlier removal)

Statistical Analysis & Calculations

3 of 6

Covers the actual statistical analysis performed to determine process capability, including calculating key metrics.

Sample Size (n)

Mean (X̄)

Standard Deviation (s)

Upper Specification Limit (USL)

Lower Specification Limit (LSL)

Cp Calculation

Cpk Calculation

Pp Calculation

Ppk Calculation

Distribution Type Assumed (e.g., Normal)

Interpretation & Reporting

4 of 6

Addresses the interpretation of results and the creation of a clear and actionable report.

Executive Summary of Findings

Cp (Process Capability Index)

Cpk (Process Capability Index - Lower)

Cpm (Process Capability Index - Adjusted)

Process Meets Capability Requirements?

Explanation of Capability Index Results & Trends

Recommendations for Process Improvement

Control Chart Image

Potential Risks Identified during the Study

Corrective Action & Follow-Up

5 of 6

Focuses on the steps taken to improve process capability and ensures follow-up actions are tracked.

Describe the identified root cause(s) of the process capability deficiency.

Outline the proposed corrective actions to address the root cause(s).

Estimated Cost of Corrective Actions (USD)

Target Completion Date for Corrective Actions

Assigned Responsibility for Corrective Actions

Which departments will be involved in the corrective action?

Describe the specific metrics used to verify the effectiveness of corrective actions.

Date of First Verification Measurement

Status of Corrective Action

Documentation & Record Keeping

6 of 6

Covers the documentation of the entire process capability study for future reference and auditing.

Study Start Date

Study Completion Date

Study Objective and Scope Description

Raw Data File(s)

Statistical Analysis Output (e.g., Minitab, Excel)

Summary of Findings & Conclusions

Description of Corrective Actions Taken (if any)

Revision Number of Document

Document Status (e.g., Draft, Approved, Obsolete)

Reviewer Signature

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