FMEA
Master Failure Mode and Effects Analysis using the unified AIAG/VDA 7-step approach and integrate findings into ISO 26262 hardware safety analysis.
- Chapters
- 12
- Chapters
- Interactive Tools
- 6
- Interactive Tools
- Case Study
- 1
- Case Study
- Video
- 1
- Video
Quick answers
- What is FMEA in ISO 26262?
- Failure Mode and Effects Analysis is a systematic, bottom-up inductive method that identifies how a design or process element can fail, what effects each failure mode has, and which controls prevent or detect it. In ISO 26262, safety analyses are required by Part 9 Clause 8, and FMEA is one of the primary qualitative techniques used to satisfy them - typically as a Design FMEA feeding the Part 5 hardware safety analysis. Modern automotive practice follows the unified AIAG/VDA handbook: a 7-step process from planning and structure analysis through function and failure analysis to risk analysis, optimization, and documentation.
- What is the difference between RPN and Action Priority (AP)?
- The classic Risk Priority Number multiplies Severity, Occurrence, and Detection into a single 1-1000 figure - simple, but it treats S9/O2/D2 the same as S2/O9/D2, hiding severe risks behind low products. The AIAG/VDA handbook replaced it with Action Priority: a lookup table that maps each S/O/D combination to High, Medium, or Low priority, weighting severity so a severe-but-rare failure cannot be averaged away. AP tells you whether action is required, not just how a number ranks. The course covers both, including thresholds, action triggers, and when legacy RPN reporting is still asked for.
Why it pays for itself
Run the 7-step process correctly
Walk the unified AIAG/VDA methodology step by step - function analysis, failure nets, S/O/D rating, Action Priority - with entry and exit criteria that keep team sessions from drifting into box-ticking.
Ratings your team can defend
Calibrated Severity, Occurrence, and Detection criteria with automotive-specific examples produce consistent, auditable scores across teams - and settle the RPN-versus-AP question with clear guidance on when each applies.
FMEA that feeds the safety case
Connect failure modes to ISO 26262 Part 5 diagnostic coverage claims and Annex D assignments, so the DFMEA becomes traceable evidence in the hardware safety analysis instead of a parallel quality exercise.
What you’ll be able to do
Conduct a Complete DFMEA
Facilitate and document a full Design FMEA following the AIAG/VDA 7-step process with proper function analysis and failure nets.
Apply Consistent Rating Criteria
Rate Severity, Occurrence, and Detection with calibrated criteria to produce reliable, auditable risk priority scores.
Identify Safety-Critical Failure Modes
Systematically identify single-point failures, residual risks, and latent failure modes relevant to ISO 26262.
Link FMEA to Diagnostic Coverage
Connect failure mode analysis to ISO 26262 Part 5 diagnostic coverage assignments with traceable evidence.
Integrate FMEA into ISO 26262 Process
Position DFMEA as a formal safety analysis work product within the ISO 26262 Part 5 hardware development process.
Manage FMEA as a Living Document
Maintain the FMEA through ECOs, design changes, and production updates with version control and re-assessment records.
Chapter by chapter
- 01
Introduction to FMEA
Understand what FMEA is, why it matters, and how it fits into automotive product development and ISO 26262.
- History & evolution
- FMEA types overview
- Regulatory context
- 02
FMEA Fundamentals
Learn core FMEA concepts: failure modes, effects, causes, controls, and the risk priority framework.
- Failure mode definition
- Effect vs cause
- Control types
- 03
AIAG/VDA 7-Step Process
Walk through the unified AIAG/VDA FMEA methodology step-by-step with practical guidance at each stage.
- All 7 steps
- Entry & exit criteria
- Team facilitation
- 04
Design FMEA (DFMEA)
Apply DFMEA to identify and mitigate product design failure modes before hardware release.
- Function analysis
- Failure net
- Design controls
- 05
Process FMEA (PFMEA)
Apply PFMEA to manufacturing and assembly processes to prevent production-induced failures.
- Process steps
- Detection controls
- Action tracking
- 06
Rating Criteria: S, O, D Scales
Master the Severity, Occurrence, and Detection rating criteria with automotive-specific examples for consistent scoring.
- 1-10 rating scales
- Calibration examples
- Cross-team alignment
- 07
RPN & AP Calculation
Calculate Risk Priority Numbers and Action Priorities, and learn when each metric is appropriate.
- RPN vs AP
- Priority thresholds
- Action triggers
- 08
SPF, Residual & Latent Failures
Identify single-point failures, residual risks, and latent failure modes with safety-specific analysis techniques.
- SPF identification
- Residual risk
- Latent fault analysis
- 09
Diagnostic Coverage Linkage
Connect FMEA failure modes to diagnostic coverage claims and validate ISO 26262 Part 5 Annex D assignments.
- DC percentage mapping
- Annex D alignment
- Evidence generation
- 10
ISO 26262 Integration
Integrate DFMEA with the ISO 26262 hardware safety analysis process and hardware architectural metrics.
- Part 5 requirements
- FMEA as safety analysis
- Work product alignment
- 11
Best Practices
Apply proven best practices for FMEA facilitation, living document management, and quality improvement.
- Living document
- Facilitation tips
- Quality gates
- 12
Common Pitfalls
Recognize and avoid the most frequent FMEA mistakes that lead to incomplete analysis and audit findings.
- Top 10 mistakes
- Audit failure patterns
- Remediation steps
Not just text: the visual toolkit
RPN & AP Calculator
Compute Risk Priority Numbers and Action Priorities interactively with calibrated S, O, D ratings.
Failure Net Builder
Construct function-failure-effect chains using the AIAG/VDA structure tree approach.
FMEA Worksheet
Fill out a complete DFMEA worksheet with guided rating criteria and automatic AP calculation.
Diagnostic Coverage Mapper
Map failure modes to ISO 26262 Annex D diagnostic mechanisms and calculate coverage percentages.
SPF Identifier
Systematically identify single-point failure candidates in your hardware design using guided analysis.
7-Step Process Navigator
Step through the AIAG/VDA process with checklist gates and examples at each stage.
DFMEA for an ASIL-C Electronic Throttle Control (ETC) Module
Walk through a complete DFMEA for an Electronic Throttle Control module, from function analysis through action prioritization and ISO 26262 integration.
- Function analysis: 12 functions, 34 failure modes identified and rated
- Failure net: throttle stuck-open path traced through 4 effects to vehicle level
- SPF analysis identified 2 single-point failure candidates requiring design changes
- Diagnostic coverage mapped: 89% DC achieved for ASIL-C hardware requirements
- Action log: 6 priority actions reduced AP from H to L within 4-week design iteration
Unlock in course
Who this guide is for
- Hardware and system engineers assigned their first DFMEA facilitation
- Quality engineers moving from RPN-era FMEA to the AIAG/VDA Action Priority logic
- Safety engineers who must link FMEA rows to diagnostic coverage and FMEDA inputs
- Teams whose last FMEA came back from audit with completeness findings
Frequently Asked Questions
Common questions about FMEA
Start the course today
A free account unlocks one full concept guide, 3 work product templates, 1 guided process, the Markov simulator, and 5 practice exams per month. The Pro and Expert plans unlock more of the 78-guide library. No credit card required.