Technology Never Stands Still, and Neither Do We
Validated Mini-ITX platforms engineered for reliable deployment in industrial, edge, and embedded system environments.
INDUSTRIAL RELIABILITY SCREENING TOOL
Industrial PC MTBF Calculator
Combine component FIT values into a system failure-rate estimate, calculate MTBF, mission reliability, fleet failures, availability, and expected downtime under a constant-hazard screening model.
FIT and MTBF conversionSeries-system failure-rate modelFleet and availability planning
SERIES RELIABILITY MODELCONSTANT HAZARD REGION
ADJUSTED FIT1,014 FIT
MTBF986,193 h
ONE-YEAR RELIABILITY99.12%
INTERACTIVE FIT AND AVAILABILITY MODEL
Estimate System MTBF from Component Failure Rates
Enter FIT values from vendor data, a chosen reliability method, or field evidence. Built-in profiles are illustrative planning examples only.
FAILURE-RATE INPUTS
Component FIT and Multipliers
FIT
FIT
FIT
FIT
FIT
FIT
%
h
h
units
ACTIVE RELIABILITY MODEL
Fanless Industrial Gateway
Board + CPU
44.9%
Memory
10.3%
Storage
15.4%
Power Supply
23.1%
Fans
0.0%
Expansion + Other
6.4%
100%Reliability0%
0 h8,760 h: 99.12%Mission
- Base Component FIT
- 800 FIT
- Adjusted System FIT
- 1,014 FIT
- Dominant Contributor
- Board + CPU
- Annual Operating Hours
- 8,760 h
FIT inputs must use a consistent basis.
Do not mix unrelated vendor claims, field data, and handbook predictions without documenting the method, environment, confidence, and operating assumptions.
Inputs are within the calculator screening range
ESTIMATED SYSTEM MTBF986,193 hAbout 112.6 years under the entered constant-hazard assumptions.
INTERPRETATIONPlanning estimate only
MTBF is a statistical failure-rate metric, not a guaranteed service life or warranty period.
Adjusted System FIT1,014 FIT
MTBF in Years112.6 years
Mission Reliability99.12%
Annual Failure Probability0.88%
Expected Fleet Failures per Year0.88
Steady-State Availability99.9996%
Expected Downtime per Year0.04 h
Annual Operating Exposure8,760 h
CALCULATION BASIS
FIT, MTBF, Reliability, and Availability Relationships
The model assumes statistically independent series blocks and a constant failure rate during the useful-life region.
Series-System FIT
FITsystem = sum of component FIT valuesQuantities multiply per-item FIT before environment and quality multipliers are applied.
MTBF Conversion
MTBF hours = 1e9 / FITsystemOne FIT equals one expected failure per one billion device-hours under the stated conditions.
Mission Reliability
R(t) = exp(-t / MTBF)This exponential relationship applies only when a constant hazard rate is a reasonable approximation.
Availability
A = MTBF / (MTBF + MTTR)Steady-state availability combines failure frequency with the entered average repair time.
INPUT QUALITY
Use Consistent Reliability Evidence
The calculator is only as credible as the FIT values and multipliers entered.
Vendor FIT Data
Confirm the reference temperature, confidence level, stress conditions, and whether the value represents a component, module, or complete assembly.
Prediction Standards
Use one documented method such as a selected handbook or company model. Do not treat different prediction methods as directly interchangeable.
Field Evidence
Field-derived rates require enough installed operating hours, consistent failure definitions, and attention to censored or repaired units.
Environment Multipliers
Enter multipliers from your chosen reliability method or internal evidence rather than assuming a universal industrial factor.
ENGINEERING BOUNDARY
What the Estimate Includes and What Reliability Engineering Must Verify
Included in the Screening Estimate
- Component and subsystem FIT summation
- Quantity-based contribution calculation
- Environment and quality multipliers
- MTBF and mission reliability conversion
- Fleet failures, availability, and downtime
Verify Outside the Calculator
- Failure-mode definitions and coverage
- Confidence intervals and uncertainty
- Wear-out, infant mortality, and maintenance
- Common-cause and dependent failures
- Official SR-332, IEC 61709, or MIL-HDBK-217 implementation
MTBF IS NOT PRODUCT LIFE
Use MTBF for comparative reliability planning, then support design decisions with component evidence, qualification testing, field data, and a documented prediction method.
NEXT ENGINEERING CHECKS
Related Thermal, Power, and Mechanical Tools
Reliability estimates should be paired with the operating conditions that drive stress and failure.
01
CPU Thermal Headroom Calculator
Check cooling margin at the intended workload and ambient temperature.
Check CPU headroom →02Thermal Resistance Calculator
Estimate the thermal-resistance requirement for a defined heat load.
Calculate thermal resistance →03Mini-ITX Power Budget Calculator
Build continuous and peak platform power requirements.
Build power budget →04Mini-ITX Size and Clearance Checker
Screen enclosure footprint, component height, and connector clearance.
Check mechanical fit →INDUSTRIAL PC MTBF FAQ
Practical Questions About Reliability Estimates
MTBF is useful when the assumptions and evidence are visible.
The answers focus on FIT, constant hazard rate, system composition, fleet failures, and availability.
Discuss an Industrial Reliability RequirementWhat does FIT mean?
FIT means failures in time. One FIT represents one expected failure per one billion device-hours under the stated model and conditions.
Is MTBF the expected product lifetime?
No. MTBF is a statistical failure-rate metric for repairable systems. It does not predict wear-out life, warranty duration, or when one unit will fail.
Can I add component MTBF values?
No. For a simple series system, add failure rates or FIT values. The system MTBF is the inverse of the total failure rate.
Why are environment and quality multipliers editable?
Multiplier definitions depend on the selected prediction method and evidence. A universal industrial multiplier would be misleading.
How are expected fleet failures calculated?
The calculator converts the adjusted failure rate into annual failure probability, then multiplies that probability by the entered fleet size.
Can this replace an official reliability prediction?
No. Formal work may require documented part stress, environment, quality, confidence, and standard-specific calculations plus field validation.