Co-existence of dFMEA and ISO 14971
22 Apr 2025
Design FMEA (Failure Mode and Effects Analysis) and ISO 14971 are the most sought-after risk management frameworks in the medical device manufacturing industry. However, differences in opinions arise between their applications. While one school of thought may not consider ISO 14971 as rigorous as dFMEA, others may consider dFMEA as unnecessary in the presence of ISO 14971.
But what if both frameworks can not only co-exist but also complement each other, leading to a more comprehensive and robust risk management strategy? Let us explore this idea in-depth here in this blog.
The Approach to Risk Management
To begin with, we will first look at the different approaches taken by ISO 14971 and dFMEA regarding risk management.
Risk Management in ISO 14971
In ISO 14971, a top-down approach is taken for medical device risk management. The flow of this framework would look:
According to ISO 14971, risk is the product of severity of the harm and the likelihood of it recurring. A risk matrix can determine risk for a harm. In case the risk is acceptable, three risk control options are given by the standard to reduce this severity and the probability of the harm (or both). These three options are:
- Providing information to use a device with safety or providing safety training (e.g. providing a label on the device).
- Making the design and manufacturing of the device inherently safe (e.g. making design changes for risk reduction)
- Installing protective measures in the device or integrating protective measures during manufacturing (e.g. adding a plastic shield)
Risk control effectiveness must be verified, and any residual risk must be evaluated for acceptability before the device is released.
Risk Management in dFMEA
While ISO 14971 takes a bottom-down approach, dFMEA takes a bottom-up approach. Anyone using the dFMEA would consider all the individual components and parts of a medical device and deduce if any failure could be associated with their use.
In this framework, failure modes—defined as how a component can fail—are identified. Their potential effects on the overall system are then analyzed. This allows medical device manufacturers to proactively introduce mitigation strategies at the design level.
Hence, dFMEA is considered a valuable tool in designing and developing robust, high-integrity medical devices.
By systematically identifying and addressing component-level risks early in the product development lifecycle, dFMEA enhances design reliability and patient safety.
Understanding the Interaction Between dFMEA and ISO 14971
If an organization is already implementing ISO 14971, what justifies incorporating dFMEA into its risk management program? Here are three strategic reasons:
- Fulfillment of ethical requirements: Has the organization done everything in its power to ensure the safety of a medical device for its users?
- Regulatory and legal requirements: Is the organization following the required regulations correctly? Are all the measures being taken to help the device follow the required regulatory pathway to the market?
Economic requirements: Are all the measures being taken to ensure integrity of the medical device and its competitiveness in the market?
While ISO 14971 can help cover ethical and legal requirements, dFMEA adds value by covering the economic aspect of the medical devices more efficiently.
This synergy ensures comprehensive risk coverage—spanning safety, compliance, and cost-effectiveness.
Establishing the Connection between ISO 14971 and dFMEA
Despite their methodological differences, ISO 14971 and dFMEA are not in opposition. Their risk assessment philosophies are highly compatible and even encouraged to be used together.
We can reference Annex C of ISO 14971:2019, which clearly states:
Although this approach is useful for the reason described, it should be recognized that it is not a thorough analysis. Many sequences of events will only be identified by the systematic use of risk analysis techniques (such as those described in ISO/TR 24971).
These other techniques described in ISO/TR 24971 include:
- FMEA (Failure Mode Effects Analysis)
- Fault Tree Analysis (FTA)
- Hazard and Operability Study (HAZOP)
- Preliminary Hazard Analysis (PHA)
- Hazard Analysis Critical Control Point (HACCP)
As clear, FMEA is among the risk analysis techniques recommended by ISO 14971. According to the standard, the techniques mentioned above are complementary, and it’s necessary to use more than one of them in order to support a thorough and complete risk analysis.
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As regulations and compliance become stricter with each passing day, medical device manufacturers look for more workable options. At TSQ&E, our regulatory consultants are ever ready to help medical device manufacturing organizations and industries to become compliant with the latest developments and standards.
Our top experts will help you in establishing a risk management system that is compliant not only with ISO 14971 but also dFMEA-friendly. This way, you will market user-friendly, regulatory compliant, and profitable products in the medical device market. Contact us today!
