A Practical Step-by-Step Approach to IVDR Class B Implementation and Conformity Assessment
Implementing the In Vitro Diagnostic Regulation requires manufacturers to coordinate regulatory, technical and quality management activities throughout the development and commercial lifecycle of a diagnostic device. For Class B products, this preparation is especially important because the IVDR requires notified body involvement in conformity assessment. Manufacturers must therefore establish an organised process for demonstrating that their products meet applicable safety and performance requirements.
Many regulatory difficulties can be traced to a lack of early planning. A manufacturer may have a functioning product and established production procedures but still lack a complete classification rationale, performance evaluation strategy or technical documentation package. These gaps can complicate the notified body assessment process and require additional work.
A step-by-step implementation strategy can help companies understand their obligations, allocate resources and maintain consistency between product development and regulatory documentation. The IVDR Class B information published by I3CGLOBAL at i3cglobal.com/ivdr-class-b/ highlights important areas such as Annex II and Annex III documentation, quality management, notified body assessment and performance evidence.
Step 1: Establish the Intended Purpose and Device Classification
Every successful IVDR compliance project should begin with a clear definition of the device's intended purpose. This statement identifies what the device is designed to detect or measure, the type of specimen used, the intended user and the medical purpose of the test. It should also explain the relevant target population and any limitations associated with use.
Once the intended purpose has been established, the manufacturer should review the classification rules in Annex VIII of Regulation (EU) 2017/746. The applicable rule determines whether the device belongs to Class A, B, C or D. Class B applies where the product meets the relevant low-to-moderate risk classification criteria and does not fall into a higher category.
The classification rationale should be recorded in the regulatory documentation. If the manufacturer develops multiple products, each product should be assessed according to its intended purpose rather than assuming that all devices have the same classification.
Step 2: Conduct a Regulatory Gap Assessment
A regulatory gap assessment compares the manufacturer's current documentation and procedures against the requirements of the IVDR. This is particularly useful for companies transitioning from the IVDD because older documentation may not address all the additional requirements introduced by the newer regulation.
The assessment should examine product information, classification, quality management, risk management, performance evaluation, technical documentation and post-market surveillance. It should also consider applicable labelling, traceability and registration obligations.
Areas That Should Be Reviewed
- Existing product technical files and device descriptions.
- Intended-purpose statements and classification decisions.
- Quality management system procedures and implementation records.
- Analytical performance and clinical performance evidence.
- Scientific validity documentation.
- Risk management and benefit-risk analysis.
- Manufacturing process validation and supplier controls.
- Labelling and instructions for use.
- Post-market surveillance and vigilance arrangements.
The results should be converted into a corrective action plan with clear responsibilities and priorities. This allows manufacturers to address the most important compliance gaps before preparing a notified body submission.
Step 3: Develop an IVDR-Compliant Quality Management System
The quality management system must support the manufacturer's regulatory responsibilities and ensure that product quality is consistently controlled. EN ISO 13485:2016 is commonly used as the basis for medical device quality management. Manufacturers should assess whether their existing system addresses the applicable IVDR requirements.
Quality procedures should cover design and development, document control, supplier management, production, inspection, traceability, equipment maintenance and nonconforming product management. The system should also address complaints, corrective and preventive actions, post-market activities and regulatory reporting where applicable.
Integrating Quality Processes Into Daily Operations
QMS procedures should reflect actual business activities. A procedure that exists only as a document but is not implemented effectively will not provide a reliable basis for regulatory compliance. Employees should understand their responsibilities, maintain required records and follow approved procedures when carrying out relevant tasks.
Manufacturers should also establish a controlled process for reviewing changes. Changes to formulation, software, manufacturing equipment, suppliers, intended purpose or product specifications may affect the regulatory status and supporting evidence of a device.
Step 4: Prepare Technical Documentation Under Annex II and Annex III
Technical documentation should be prepared systematically. Annex II contains the principal technical documentation requirements, while Annex III focuses on post-market surveillance documentation. Together, these documents help demonstrate how the device meets regulatory requirements and how the manufacturer will monitor its performance after market placement.
The technical file should contain a comprehensive description of the device, its variants, accessories and intended purpose. It should explain design and manufacturing arrangements and provide the evidence necessary to support compliance with applicable GSPRs.
Manufacturers should also establish traceability between requirements, test methods, results and conclusions. For example, if a performance claim appears in the instructions for use, the manufacturer should be able to identify the relevant validation evidence supporting that claim.
Step 5: Establish a Performance Evaluation Programme
Performance evaluation should be planned according to the device's intended purpose and technical characteristics. Under the IVDR, the manufacturer must establish scientific validity, analytical performance and clinical performance as applicable. These elements should be supported by appropriate evidence and documented in the performance evaluation documentation.
Scientific Validity
Scientific validity explains the relationship between the analyte or marker being measured and the clinical condition or physiological state being investigated. Manufacturers should identify relevant scientific literature and other appropriate information that supports the intended diagnostic purpose.
Analytical Performance
Analytical performance studies evaluate the technical ability of the device to measure or detect its intended target. Depending on the device, relevant characteristics may include accuracy, precision, analytical sensitivity, analytical specificity, reproducibility, detection limits, measuring range and interference.
Clinical Performance
Clinical performance evidence demonstrates the relationship between the device's test results and the intended clinical application. The manufacturer should select appropriate evidence and methods based on the product's intended use and the applicable regulatory requirements.
Step 6: Select an Appropriate Notified Body Assessment Route
Class B devices require notified body involvement. Manufacturers should identify a suitable notified body and determine the conformity assessment route that applies to their regulatory strategy.
Annex IX provides a route based on a quality management system assessment combined with technical documentation assessment. It includes provisions for the assessment of representative devices within relevant categories. Annex XI provides a production quality assurance route. The manufacturer should understand the applicable assessment requirements before finalising its submission strategy.
Documentation should be organised to make the review process understandable. If a product portfolio includes several devices, manufacturers should prepare a clear explanation of product categories, shared characteristics, differences and representative device selection.
Step 7: Review Labelling, UDI and Registration Responsibilities
Labelling and instructions for use must provide accurate and consistent information about the device. The intended purpose, warnings, precautions, specimen requirements, storage conditions and operating instructions should be supported by the technical documentation.
Manufacturers must also address applicable Unique Device Identification requirements. UDI supports device identification and traceability across relevant regulatory and supply chain processes. EUDAMED registration obligations should be evaluated according to the applicable legal provisions and implementation arrangements.
Step 8: Establish Post-Market Surveillance Activities
Regulatory compliance continues after the device has entered the market. Manufacturers must establish a post-market surveillance system that collects and evaluates relevant information about device performance and safety. This information can include complaints, feedback, field experience, performance trends and relevant scientific developments.
Post-market findings should be evaluated through controlled procedures. Where problems are identified, manufacturers may need to investigate the cause, implement corrective actions and update risk management or performance evaluation documentation.
How I3CGLOBAL Can Assist With Implementation Planning
Manufacturers may need specialist support when interpreting classification requirements, preparing technical files or reviewing performance evaluation documentation. I3CGLOBAL describes its IVDR Class B service as a combination of regulatory guidance and product technical consultation. Its website provides information about relevant compliance activities and notified body assessment considerations.
Companies considering external assistance should define their project scope clearly. Support may involve gap assessment, technical documentation preparation, quality system review, performance evaluation guidance or regulatory submission preparation. The exact deliverables should be agreed before work begins.
Common Implementation Mistakes to Avoid
- Using an incorrect classification without a documented rationale.
- Preparing technical documentation without checking Annex II and Annex III requirements.
- Assuming an ISO 13485 certificate alone proves IVDR conformity.
- Using performance claims that are not supported by appropriate evidence.
- Ignoring differences between products within the same portfolio.
- Delaying notified body planning until the technical file is complete.
- Failing to align labelling and instructions for use with technical documentation.
- Neglecting post-market surveillance planning.
Conclusion
A structured IVDR Class B implementation programme helps manufacturers coordinate classification, quality management, technical documentation, performance evaluation and notified body assessment. Each activity contributes to the overall demonstration of product safety and performance.
Rather than treating regulatory preparation as a final administrative task, manufacturers should integrate IVDR requirements into their product development and manufacturing IVDR Class B Devices systems. I3CGLOBAL's IVDR Class B consulting information can help businesses explore regulatory and technical support options while developing a practical compliance strategy for IVDR Class B Devices the European market.