rmForge blog

After conceiving a new medical device design, the next move for efficient product development is to initiate design controls through documented Design Inputs. Design Inputs are the written translation of user needs and intended uses into product requirements. Documented, released into a controlled and traceable system, they tell the team exactly what is being designed.

When Design Inputs are defined, referenced, and justified, the next move in the design control process is generating Design Outputs. Design Outputs are the concrete specifications that bring the device into reality, the testable products that enable preliminary bench tests, Design Verification, and Design Validation (DV&V) including preclinical and clinical trials. They document the design for ordering components and manufacturing repeatable, reproducible product.

Design Verification and Design Validation (DV&V) is where engineering, pilot production, preclinical data, and regulatory requirements converge. It establishes whether the product is ready for the next design review, regulatory submission, ethics committee review, or clinical use. It is not just testing. It is structured, documented evidence that Design Outputs meet the Design Inputs and that the device conforms to the User Needs and Intended Uses.

Risk management is not a parallel activity. It is embedded in design controls. Yet teams routinely treat the risk management file as a standalone deliverable, drafted late, disconnected from Design Inputs and Design Outputs, and reviewed in isolation from Design Verification and Design Validation.

Design Inputs tell the team what to design. Design Outputs are the specifications that detail what is to be built. Design Verification and Design Validation (DV&V) prove the outputs met the inputs. Risk management techniques assess hazards and failure modes to create risk control measures through requirements (inputs), implementation (outputs), and verification (DV&V) thereby reducing risk. Each of these lives in its own document, and that is exactly where projects can lose the thread. The Design Input and Output Matrix along with a comprehensive Hazard Analysis is the design table that ties all of it together, row by row, with a traceable identifier on every requirement.