A great medical device idea is not enough; regulators want proof that the device was designed to be safe and to do what it claims. In the United States, that proof comes from design controls, the structured, documented process that connects user needs to a finished, validated product. For decades the rules lived in FDA regulation 21 CFR 820.30, and as of 2026 they sit inside the agency’s new Quality Management System Regulation (QMSR). Either way, the discipline is the same, and it is foundational to any medical device career.

What design controls actually are

Design controls are a set of quality-system requirements that force a manufacturer to manage device design deliberately, from concept through production, rather than improvising. They apply to all Class II and Class III devices and to a short list of non-exempt Class I devices. The framework is built from a handful of connected elements:

• Design and development planning, defining the activities and who is responsible.
• Design inputs, the user needs and requirements the device must meet.
• Design outputs, the specifications, drawings, and code that result.
• Design review, formal checkpoints to catch problems early.
• Verification and validation, confirming the device meets its inputs and works for real users.
• Design transfer, translating the design into manufacturing.
• Design changes, controlling every modification, and the Design History File (DHF) that records it all.

Inputs, outputs, and the logic of verification vs. validation

The heart of design controls is traceability. Every design output should trace to a design input, and every input should trace to a user need. Two related but distinct checks close the loop: verification asks “did we build the device right?” (does the output meet the input?), while validation asks “did we build the right device?” (does it meet the user’s needs in real conditions?). Confusing the two is one of the most common and costly mistakes in device development.

The Design History File

All of this evidence is gathered in the Design History File. The DHF demonstrates that the device was developed in accordance with the approved design plan and the design control requirements. During an inspection or a submission, it is the story of how a device came to be, and a disorganized DHF is a frequent source of findings.

What changed in 2026: design controls under the QMSR

On February 2, 2026, the FDA’s Quality System Regulation was replaced by the Quality Management System Regulation (QMSR), which incorporates the international standard ISO 13485:2016 by reference. In practice, the familiar design-control concepts now map to ISO 13485’s design and development clause, aligning U.S. expectations with the rest of the world. The vocabulary may shift, but the obligation to plan, document, verify, validate, and trace a design remains firmly in place.

Build design-control fluency

Design controls reward people who can think in systems and document with discipline. Aleph University’s Design Controls course works through the full process, inputs and outputs, verification and validation, design transfer, and the DHF, as part of a broader catalog of continuing-education courses in medical devices, regulatory affairs, and quality. It complements our guides to ISO 14971 risk management and FDA device pathways.

Want to master design controls? Request information and a custom quote for yourself or your team.