The medical device industry is a highly regulated space, with manufacturers having to adhere to numerous guidelines and regulations set forth by regulatory bodies like the U.S. Food and Drug Administration (FDA). One such critical regulation is the Quality System Regulation (QSR) in 21 CFR Part 820, which mandates manufacturers to establish and maintain procedures to control their device designs. This blog post aims to simplify the understanding of the various stages involved in the design control process under the QSR.
Design and Development Planning
The planning phase is essentially about preparing a roadmap for the design process. This plan outlines the development process, responsibilities, resources needed, and necessary activities. Inputs include user needs, market research, regulatory requirements, and lessons learned from previous design experiences. The planning phase ensures that all necessary activities are identified and scheduled, often necessitating regular updates throughout the design process.
Design Input
Design input translates the needs of the user and the market into specific requirements that the device must meet. It is an iterative process requiring continual refinement based on regulatory requirements, safety guidelines, and practical considerations. The goal is to produce documented design inputs that clearly define the device’s intended purpose and necessary safety requirements.
Design Output
Design output is the tangible outcome of the design process, including the physical product or device, documented specifications, drawings, and procedures. These outputs should directly correlate with the design input requirements, providing a comprehensive enough framework to enable proper manufacturing of the device.
Design Review
The design review is a formal assessment process to ensure all design requirements are met. It entails the examination of the design plan, design input, design output, and other relevant documentation. Crucially, it should be conducted by individuals who do not have direct responsibility for the design stage being reviewed, thereby providing an unbiased evaluation.
Design Verification
Design verification provides documented evidence that the design output satisfies the design input requirements. This process involves various testing activities and effectively confirms that the design output correctly represents the design input.
Design Validation
Design validation assures that the device works as intended in its final form. It requires testing the final device or product and providing documented evidence that it meets user needs and intended uses. Activities in this phase may include clinical evaluations and further testing.
Design Transfer
The design transfer phase facilitates the transition of the design into production. It ensures that manufacturing procedures, production specifications, and other production documentation are properly aligned with the final design outputs.
Design Changes
The design change phase involves identifying and controlling alterations to the design post-approval. Any such changes must be systematically handled, validated or verified as appropriate, and updated in design documentation and manufacturing procedures.
Design History File (DHF)
The DHF is a comprehensive record of the entire design process, collating all the information from the above phases. It proves that the design was developed following the approved design plan and the requirements of 21 CFR Part 820.30.
Understanding these phases is crucial for medical device manufacturers as the processes are not strictly linear and often overlap or iterate. Moreover, the complexity and nuance of the process can vary depending on the nature of the device and the specific regulatory requirements.
Ultimately, the goal of these rigorous controls is to ensure that the medical devices hitting the market are safe, effective, and meet the needs of end users. By adhering to these design control processes, manufacturers not only comply with regulatory standards but also improve the overall quality and reliability of their products.
C. Austin Insight 