First Article vs Routine Lot Inspection for Medical Sheet Metal

A first article is accepted, the next shipment arrives, and purchasing asks whether another full report is needed. The answer should come from an agreed quality plan—not from assuming that the first approval covers every future part, or that every shipment must repeat the entire initial exercise.

First-article inspection and routine lot inspection answer different questions. The first establishes evidence for a defined initial or changed manufacturing configuration. Routine controls address the ongoing output supplied under that configuration. Both need clear scope and release authority.

Compare the purpose before comparing the paperwork

For medical sheet metal, the customer should define what “first article” means in the purchase agreement. It might require a dimensional report, material and finish records, interface checks, or a customer-specific submission.

The distinction prevents two common mistakes: shipping later parts solely because an earlier sample passed, and requesting a full first-article package without deciding what new question it needs to answer.

Do not assume an aerospace form is mandatory

IAQG’s 9102 standard overview describes a standardized FAI approach developed for aviation, space and defense, with possible use in other sectors. That does not make it a universal requirement for medical-equipment brackets.

If an OEM requests a particular standard or form, identify the applicable revision, scope and contractual requirements. Otherwise agree a submission format that addresses the actual order. Avoid using a familiar acronym as a substitute for defining the deliverable.

Make the initial submission representative

Identify the material, route, tooling or fixtures, hardware and finish used for the submission where relevant to the agreed scope. Record exceptions from intended routine production rather than hiding them.

An unfinished sample may answer a forming question but cannot demonstrate the delivered coating interface. A hand-modified sample may help development but is not evidence that the unmodified routine route produces the same result.

The existing first-article enclosure fit-up checklist explains how to evaluate a specific assembly interface. This article addresses the separate decision about what happens after that initial evaluation.

Define the routine lot and its records

The plan should state how a lot or production group is identified and which controls apply. Include the drawing revision, relevant process conditions, required material or finish linkage and any defined inspection coverage.

Where parts pass through outside processing, agree how their identity will remain connected to the returning material. If several configurations share a delivery carton, the carton alone may not provide the traceability required for each part family.

Do not copy a sample quantity from an unrelated order. Sampling needs a defined population and decision rule. Criticality, applicable requirements, process evidence and customer agreements influence the approach; this guide does not prescribe a universal medical sampling plan.

Establish change triggers before the first reorder

Agree which events require notification and review, and which may require partial or complete first-article work. Potential review triggers include a drawing change, a new relevant manufacturing route, replaced tooling, a changed finishing source or a corrective action affecting a controlled feature.

Not every change has the same effect. A corrected note and a moved mounting interface can require different evidence. The responsible engineering and quality teams should assess what is affected and document the resulting scope.

A partial review needs a defined boundary: what is being rechecked, why that coverage is adequate, and which existing evidence remains applicable. Do not label a limited check a complete new approval.

Keep containment separate from requalification

If a routine lot fails, first protect and identify the affected output. A new first-article report does not retrospectively accept suspect parts or close their disposition.

Investigate whether the issue is isolated, recurring, related to the measurement method, or associated with an unassessed change. Use an NCR for the material decision and a corrective-action process where required. The resulting evidence may then define a requalification or repeat first-article scope.

Give each approval a precise meaning

A first-article disposition should identify the submitted configuration, records reviewed, unresolved conditions and what work is authorized next. Approval of evaluation samples does not necessarily authorize an unrestricted production run.

Routine release should likewise identify the output accepted and any approved exceptions. A shipment certificate can summarize an agreed release, but it should not stand in for missing records that the contract explicitly requires.

At the OEM, incoming kit inspection can confirm the received configuration, condition and agreed documentation. Receiving and supplier inspection should use aligned criteria rather than independently inventing them.

Request the right package for your production stage

For medical equipment sheet-metal parts, tell DRAmetal whether the RFQ is for engineering prototypes, a production-intent pilot, repeat supply or a changed configuration. Provide required first-article documents, routine records, change-notification rules and approval contacts.

This makes the quality scope quotable and prevents a prototype order from quietly becoming a repeat-production agreement. The practical goal is continuity: the first submission establishes the agreed starting point, and routine controls keep subsequent deliveries connected to it.