Contain a suspect lot before it reaches more customers

Help me contain a suspected quality problem in product that may already be shipped. The problem: [defect, how it was found, by whom, and when] Safety or regulatory risk: [could it injure someone, violate a regulation, or stop a customer line?] Known affected lots/serials and production dates: [DETAILS] Traceability available: [lot genealogy, raw material lots, machine, shift, operator, date codes] Where product may be: [WIP, finished goods, warehouses, in transit, at customers, in the field] Customers involved and their requirements: [e.g. "automotive OEM requires notification within 24 hours"] Build a containment plan: 1. Define the suspect range: work backward to the last known good part and forward to the first verified good part after the fix. Explain the logic, and widen the range if the cause is unknown. 2. Use traceability to find related product: same material lot, same machine, same tooling, same shift. 3. Quarantine actions at each location (WIP, finished goods, warehouse, in transit, customer stock), with who does it and how the stock is tagged and recorded. 4. Sorting or inspection method to release good product (100% inspection, test, and how to verify the sort works). 5. A clean-point marking for the first certified good shipments. 6. A customer notification draft: what we know, what we don't, lots affected, actions taken, next update time. 7. When to escalate to a formal recall or regulatory report, and who must decide. Return: an action list with owners and deadlines for the first 48 hours, the customer note, and a log template. Do not invent lot numbers or quantities; use [ADD]. Recall and regulatory reporting duties depend on your industry and jurisdiction; involve quality leadership and legal counsel.