FMEA — Failure Mode and Effects Analysis

Failure Mode and Effects Analysis (FMEA) is a systematic, proactive methodology for evaluating a process, product, or system to identify where and how it might fail and to assess the relative impact of different failures. Originally developed by the United States military in the 1940s under procedure MIL-P-1629, FMEA has become a cornerstone of quality engineering across aerospace, automotive, pharmaceutical, and general manufacturing sectors. In the United Kingdom, FMEA is widely adopted as a key tool within ISO 9001 quality management systems and is explicitly referenced in IATF 16949 for automotive supply chains.

Why FMEA Is Critical for Risk Management

FMEA provides a structured approach to risk identification that quantifies failure severity, occurrence probability, and detection capability into a single Risk Priority Number (RPN). The RPN scale ranges from 1 to 1,000, calculated by multiplying 3 factors each scored from 1 to 10: Severity (S) x Occurrence (O) x Detection (D). An RPN above 200 typically triggers mandatory corrective action, while scores exceeding 500 demand immediate intervention.

Research published by the British Standards Institution (BSI) found that organisations conducting FMEA during the design phase reduce product warranty claims by 42% compared to those performing analysis only after production launch. The Health and Safety Executive (HSE) recognises FMEA as an accepted risk assessment technique under the Management of Health and Safety at Work Regulations 1999.

The 7 Steps of FMEA

1. Define scope — Identify the process, product, or system boundaries. A typical manufacturing FMEA covers between 25 and 150 individual process steps
2. Assemble the team — Cross-functional teams of 4 to 8 members including design engineers, process engineers, quality managers, and maintenance specialists
3. Identify failure modes — Document every potential way each step, component, or function could fail. An average FMEA identifies 30 to 80 failure modes per process
4. Determine effects — Assess the downstream impact of each failure mode on the customer, product safety, and regulatory compliance
5. Assign severity, occurrence, and detection scores — Use standardised 1-to-10 rating scales with clearly defined criteria for each level
6. Calculate RPN and prioritise — Rank failure modes by RPN to focus resources on the highest-risk items first
7. Implement and verify actions — Assign corrective actions with target dates, responsible owners, and verification methods. Recalculate RPNs after implementation to confirm risk reduction

Types of FMEA

There are 3 primary types of FMEA, each addressing different stages of the product lifecycle:

• Design FMEA (DFMEA) — Analyses potential failures in product design before manufacturing begins. Covers material selection, tolerances, and design intent
• Process FMEA (PFMEA) — Examines manufacturing and assembly processes for potential failure modes. Required by IATF 16949 for all automotive production processes
• System FMEA (SFMEA) — Evaluates failures at the overall system level, including interactions between subsystems and software interfaces

FMEA in Practice: 3 UK Examples

Example 1: Automotive Component Supplier

A Tier 1 automotive supplier in Coventry with 420 employees conducted PFMEA across 6 production lines manufacturing brake caliper assemblies. Using Q-Hub’s risk management module to digitise their FMEA worksheets, they identified 214 failure modes, prioritised 38 with RPNs above 300, and implemented corrective actions that reduced customer PPM (parts per million defective) from 85 to 12 within 9 months.

Example 2: Pharmaceutical Packaging Line

A pharmaceutical contract packager in Leeds applied PFMEA to their blister packaging process handling 1.8 million units per week. The analysis identified 67 failure modes, with 11 classified as critical (RPN above 400). Implementing automated vision inspection systems and digitising their SOPs through Q-Hub reduced packaging error rates by 94% and eliminated 3 product recalls in the following 18 months.

Example 3: Medical Device Sterilisation

A medical device manufacturer in Cambridge used DFMEA during the development of a Class III implantable device. The team of 6 engineers identified 156 potential failure modes across 4 design subsystems. Integrating FMEA findings with their ISO 13485 quality system via Q-Hub’s document control platform enabled them to achieve MHRA approval on first submission, avoiding an estimated 8-month regulatory delay.

UK Regulatory Context for FMEA

• BS EN IEC 60812:2018 — The British Standard for FMEA methodology, providing detailed guidance on scoring criteria and documentation requirements
• IATF 16949:2016 — Requires DFMEA and PFMEA for all automotive quality management systems, with updates mandated when design or process changes occur
• ISO 14971:2019 — Specifies FMEA as a recommended risk analysis tool for medical device manufacturers
• Management of Health and Safety at Work Regulations 1999 — Regulation 3 requires suitable and sufficient risk assessment; FMEA satisfies this requirement for complex processes

How Q-Hub Streamlines FMEA

Q-Hub’s integrated quality management platform transforms FMEA from a static spreadsheet exercise into a living risk management tool. Features include automated RPN calculation, real-time dashboards tracking open actions, configurable severity scoring matrices, and direct integration with CAPA and NCR workflows. Teams using Q-Hub for FMEA management report a 60% reduction in analysis cycle time and 100% action traceability across an average of 45 concurrent FMEA studies.

Book a Q-Hub demo to digitise your FMEA process and strengthen proactive risk management.

Related QHSE Terms

• Risk Assessment
• Bow-Tie Analysis
• Root Cause Analysis
• CAPA
• ISO 9001
• Non-Conformance Report (NCR)