How to choose a human factors consultant for medical devices: 7 questions to ask

Choosing the right human factors partner for a medical device is a high impact decision. Human factors work can make or break regulatory approval, reduce use errors, and improve adoption. This guide gives seven practical questions to vet consultants, the deliverables you should expect, and common red flags.

Why human factors matters for medical devices

Regulators expect evidence that devices are safe and usable. Human factors engineering reduces use-related risk, shortens training time, and creates clearer labeling and instructions. Expect consultants to reference IEC 62366, user research, formative and summative usability testing, and risk analyses that tie to design changes.

Seven questions to vet a consultant

Ask these early to separate vendors who can execute from those who only consult:

• What medical device types have you supported, and can you share anonymized case outcomes? Look for examples with measurable results, for example reduction in use errors or shortened training time.
• Do you have experience mapping user tasks and critical use scenarios for FDA or EU submissions? Regulatory experience matters for protocol design and reporting.
• Which methods will you use, and why? Expect cognitive task analysis, formative usability testing, summative validation testing, and human factors risk traces to design controls.
• Can you produce protocols and reports that meet IEC 62366 and FDA guidance? Ask to see templates or redacted reports.
• How do you recruit representative users and define critical tasks? Strong vendors justify sampling and inclusion criteria tied to risk.
• How will you demonstrate traceability from hazards to mitigations? Look for clear matrices linking risks, mitigations, verification, and test results.
• What are typical timelines and costs for a project like ours? Get milestone pricing and scope for protocol, test sessions, analysis, and report delivery.

Deliverables you should expect

A competent supplier will provide:

• User needs and task analyses with personas and critical use scenarios
• Formative test reports with prioritized design recommendations
• Summative validation protocol and a complete test report suitable for regulatory submission
• Traceability matrix linking hazards to mitigations and verification
• Raw session materials and deidentified data for audit

Red flags and next steps

Watch for vendors who cannot share relevant examples, use only generic usability checklists, or refuse to show redacted reports. Next steps: request a scoped statement of work, ask for a small discovery engagement to map critical tasks, and require sample templates. If you want, HF Designworks can help craft a focused RFP or run a discovery sprint to define scope and expected outcomes.