Process Capability Study Checklist
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Planning & Scope Definition
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
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
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
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
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
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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