Mean Time Between Failures (MTBF) Calculation & Review Checklist
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This Template was installed 3 times.
Data Gathering & Preparation
Focuses on collecting the necessary data for accurate MTBF calculation and ensuring its quality.
Number of Units in Production
Operational Hours per Unit (per year)
Data Collection Period (e.g., Months, Years)
Description of Manufacturing Process (brief overview)
Equipment Bill of Materials (BOM)
Data Source(s) for Failure Data
Start Date of Data Collection
End Date of Data Collection
Failure Data Collection & Analysis
Details the process for collecting and analyzing failure data, including types of failures and root cause analysis.
Date of Failure Event
Time of Failure Event
Operating Hours at Time of Failure
Detailed Description of Failure Event
Failure Mode Category (e.g., Mechanical, Electrical, Software)
Affected Components (Select all that apply)
Root Cause Analysis Summary
Supporting Documentation (e.g., Photos, Logs)
Severity of Failure (Impact on Production)
MTBF Calculation Methodology
Covers the chosen MTBF calculation method and associated formulas/tools.
Chosen MTBF Calculation Method
Justification for Chosen Method
Number of Failures Used in Calculation
Total Operating Time (Hours)
Mean Failure Rate (λ) - if calculated
Description of any Assumptions Made
Spreadsheet or Software Used for Calculation (Optional)
Failure Data Correction Factors Applied?
MTBF Calculation & Validation
The step-by-step process of calculating MTBF and verifying its accuracy.
Total Operating Hours (Data Period)
Number of Failures (Data Period)
MTBF (Calculated)
Calculation Method Used (e.g., Basic, Exponential, Miner's)
Formula Used (Detailed)
Units of Time for MTBF (e.g., Hours, Days, Years)
Supporting Calculation Files (Spreadsheets, Documents)
Confidence Interval (Calculated)
Data Validity Review (Pass/Fail)
Review & Documentation
Covers the review of the calculated MTBF, ensuring it’s understood and documented appropriately.
Calculated MTBF Value (Hours)
Summary of Assumptions & Limitations in Calculation
MTBF Calculation Method Used
Date of MTBF Calculation
Reviewer Comments & Observations
Overall MTBF Result Assessment
Supporting Documentation (e.g., Failure Logs, Data Spreadsheets)
Reviewer Signature
Improvement & Corrective Actions
Focuses on identifying areas for improvement based on the MTBF review and implementing corrective actions.
Summarize Root Causes of Failures Affecting MTBF
Potential Corrective Actions (Select all that apply)
Estimated Cost of Corrective Action (in USD)
Target Completion Date for Corrective Action
Detailed Description of Planned Corrective Action
Risk Level of Proposed Corrective Action (High/Medium/Low)
Supporting Documentation (e.g., Engineering Change Orders, Test Reports)
Expected Improvement in MTBF (Estimate)
Calibration and Verification of Data Sources
Ensures the data used for MTBF calculation is accurate and reliable, validating the integrity of equipment logs and sensors.
Data Source Integrity Check Performed?
Last Calibration/Verification Date of Data Logging System
Calibration Frequency (e.g., months between calibrations)
Describe Calibration Procedure Used
Upload Calibration/Verification Documentation (e.g., reports)
Data Source Validation Method Employed?
Detailed notes/observations during data source verification (e.g., anomalies, discrepancies)
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