FDA usually places a 510(k) on hold with an additional information letter, and the sponsor has 180 days to send a complete response. The regulatory lead sorts the deficiencies, gives each one an owner and asks for a clarification call where a request is unclear. Each response restates the deficiency and then gives the requested data, an explanation of why the issue does not affect the decision, or an alternative with its rationale. Revised documents go through document control and are sent with the response.
On the map: Triage deficiencies, assign owners. Clarification call. Draft responses.
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Assign each deficiency one owner on the day it arrives. Agree with engineering and clinical whether to answer with evidence, a narrower claim or a software change.
Sort each deficiency into three groups: a misread that a clarification fixes, a gap that existing data can fill with new analysis, and a gap that needs new testing. Start the new testing first because it takes longest, and give each item one owner and a due date well inside the 180 days.
Ask for one when a deficiency can be read two ways or when the planned answer is a disagreement. Send a short agenda that quotes each deficiency and the proposed approach, so the call settles the scope of the response before the work starts.
Provide the data when it exists or can be produced in time. Argue that an item does not affect the decision only when the argument rests on the predicate, a guidance or the device design. When neither works, narrow the claim or the indications and update every document that states it.
Every fix goes through change control and regression testing. The response names the new software version and the documents updated for it, so the reviewer evaluates one consistent version.
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