A Form 483 just landed. The clock is already running.
Every observation's response on one governed thread, so the trace is the audit trail.
Fifteen working days, and only two ways it ends.
The FDA expects a written response to every observation. Respond well and the 483 closes; miss the window or send a thin response, and it escalates.
- Day 0The inspection closes
- Day 0Form 483 issued
- 15 working daysThe response window
- If it holdsThe 483 closes here
A documented, on-time response with corrective actions, owners, and dates ends it.
- If it doesn'tIt escalates toward a Warning Letter
A late or thin response is how a 483 becomes a Warning Letter; overdue CAPAs are a common repeat finding.
What breaks when the response is assembled by hand.
- Critical
Evidence across five systems
The work was done; proving it means assembling evidence from five systems and three threads while the clock runs.
- High
No single owner per observation
Observations get split across email and meetings, so no one owns a given response end to end.
- High
Corrective actions that don't close
A CAPA promised in the response but never proven effective is exactly the finding that comes back next time.
- Medium
A trace that can't be replayed
The record says what was decided, not why - so the response can't show the investigator decision-time reality.
The response, run on one accountable thread.
LiveDecision trace: assembly defect investigation
What the investigator gets back.
A response they can follow
One thread from observation to close - the decision trace, not a binder assembled after the request.
Part 11 on every approval
Each sign-off is a 21 CFR Part 11 e-signature: attributable, time-stamped, part of the trail.
Effectiveness proven to close
The corrective action carries an effectiveness check that has to pass before the record can close.
The audit trail is the response
No separate report to write - the governed thread is the evidence the response rests on.
One owner per observation
Every observation has a named owner and a date, so nothing in the response is unaccountable.
Nothing reconstructed after the fact
The context and evidence state are captured at decision time, not rebuilt from memory later.
Quality owns the clock on this one.
The frame the 483 is written against.
- FDA · US21 CFR 820
Quality System Regulation: the frame a 483 is written against, CAPA at 820.100.
- FDA · US21 CFR Part 11
Electronic records and signatures. Every approval in the response, compliant by default.
- ISO · GlobalISO 13485
Medical-device QMS: corrective action and its evidence across the lifecycle.
- FDA · US21 CFR 803
Medical Device Reporting: the adjacent clock if the observation touches an adverse event.
The FDA expects a written response within 15 working days of the inspection close. A response inside that window, with corrective actions and timelines, is what keeps a 483 from escalating to a Warning Letter.
Bring the 483 you're staring at.
We'll run one observation from signal to a sealed, 21 CFR Part 11 response - the trace the investigator can follow.