Reorders should reference approved revisions as well as order numbers
PCB reorders should confirm that manufacturing files, stackups, materials, and engineering changes still match the approved order. Historical order numbers simplify retrieval but do not automatically define current quantities, split deliveries, reports, or shipping requirements. Compared with Prototype to Production Run, this page addresses repeat manufacturing after approved records exist.
| Reorder Scenario | Confirmation Action | whether old results can be directly reused |
|---|---|---|
| Graphics and materials unchanged | Check revisions, engineering approvals, and current-batch quantities | Carry forward only applicable approved conditions while recording new batches |
| Only quantity or batch change | Confirm quote, material preparation, and delivery schedule | Manufacturing bases may remain identical; delivery commitments require new agreement |
| Materials or stackup changed | Evaluate performance and process impact and approve | do not automatically reuse original structure verification |
| Graphic, Hole, or Surface Changes | New Version, New Approved Drawing, and Inspection Scope | Old Results Support Only Old Versions |
| Supply or Execution Location Change | Confirm Subject, Process, and Required Verification | Identical process names alone cannot establish consistency |
Include engineering preparation in the manufacturing package
Retain approved CAM compensation, via processing, panelization, and special inspection requirements. Regenerating engineering documentation from incorrect original files can omit previously resolved issues. Handle material substitution first according to Material preparation and substitution rules; if the initial production transition is incomplete, close prototype changes before establishing a reorder baseline.
What batch records support later investigations of differences?
- Order and manufacturing revisions, file checksums, and approved issue records.
- Material grades, permitted substitutions, and actual lots.
- Board IDs or order-agreed identification, quantities, and split-delivery records.
- Inspection scope, results, and related board/coupon IDs.
- Deviation approvals, exception handling, and retest records.
Product requirements determine these fields; not every batch is advertised as including every special report. Through Reorder Quotation, specify “unchanged-revision reorder” or “modified reorder”; define the record scope under Quality and traceability requirements.
Data Basis:Engineering reference | Gerber manufacturing data: layer functions, drilling, and attributes, checked on 2026-10-05. Used for the corresponding file, structure, or material descriptions in this article. The procurement checklist is a communication method, not a statement of universal fabrication capability or delivery commitments.
Related procurement and acceptance Q&A
Is providing the old order number enough for re-order?
Also check approved files, materials, stackups, and engineering changes, and provide current quantities, split deliveries, reports, and shipping conditions. The order number is only a retrieval reference.
See: Reorders should reference approved revisions as well as order numbers
Can old pricing and schedules carry over when an unchanged-revision reorder increases quantity?
The manufacturing basis may remain identical, but material preparation, quotations, and delivery arrangements require reconfirmation. Historical records do not automatically become current delivery commitments.
See: Reorders should reference approved revisions as well as order numbers
Can old impedance reports be used after changing materials on a reorder?
First assess material/stackup effects and approve the new structure. Old reports support only old conditions; follow agreed inspection and verification records for the new batch.
See: Reorders should reference approved revisions as well as order numbers
Why should reorders not simply reprocess the earliest Gerber files?
The earliest files may omit approved CAM compensation, via processing, and panelization. Reorder baselines should include the manufacturing package after issues were closed, avoiding reintroduction of historical problems.
See: Include engineering preparation in the manufacturing package
What should suppliers provide when reorder batches differ?
Link orders, file checksums, actual material lots, and inspection scope, retaining board/coupon IDs and deviation approvals. Project requirements determine record depth.
See: What batch records support later investigations of differences?
Separate reusable conditions from current-order conditions
Manufacturing artwork, approved stackups, specified materials, and closed engineering changes can form a reorder baseline once confirmed unchanged. Quantities, split deliveries, prices, arrival dates, reports, and packaging are current-order conditions requiring new responses. “Same revision” does not imply that old pricing, material stock, and production arrangements remain valid.
Example: the original order approved the structure for 100 boards; the current order requests another 100 in two deliveries. Artwork may remain identical, but split counts, labels, report links, and two shipments need redefinition. If the first delivery contains 60 and the second 40, accepted quantities total 100. However, if the second batch uses unapproved materials, reaching the total quantity does not establish identical conditions throughout.
Supply batch is not just one date
| Traceability Level | Suggested Field | Association Purpose |
|---|---|---|
| Order | Project, quantity, manufacturing package, and approval records | Confirm which set of requirements to adopt |
| Manufacturing batch | Board IDs or agreed identification, actual materials, and processes | Production Condition Definition |
| Inspection batch | Sample, coupon number, method, and results | Evidence Coverage Explanation |
| Supply batch | Packaging, quantity, shipment, and receipt | Verify Quantity and Flow Direction |
These levels do not necessarily map one to one. Split shipments may come from one manufacturing batch, while one delivery may contain multiple batches. Define project traceability depth before agreeing on identification and records; do not claim every order includes every field. Retain package counts and running totals at receipt, preserving identities when boards share specifications but differ in revision.
Do not leave engineering approvals buried in historical chats
If hole-diameter compensation, outline adjustments, panelization, impedance, or special surface treatments form part of the approved manufacturing basis, save them with the file package. Before reordering, confirm whether production uses original designs, manufacturing-confirmation drawings, or approved compensated revisions. Reprocessing the earliest Gerber files may reintroduce resolved issues.
If design files change without a revision-number change, filenames alone cannot establish identity. Use directories and checksums to identify differences, then have engineering confirm manufacturing and inspection effects. Clarify undocumented changes first; automated detection is not approval.
Investigate batch differences through revisions, materials, and measurements
When holes, color, warpage, or electrical behavior differ, retain abnormal and normal board IDs, packaging, and measurement conditions first. Check separately whether files match, actual materials/processes are approved, and inspection methods agree. Solder-mask color, measurement, and functional differences have different criteria sources; photographs alone cannot establish inconsistent manufacturing across a batch.
If an unapproved batch change is confirmed, record affected quantities and destinations, then determine quarantine, expanded inspection, or other disposition under project rules. If measurement methods differ, align them before retesting. Rework or deviation-acceptance approvals apply only to listed batches and do not automatically become standard practice for future reorders.
Create a concise release record for every reorder
Inputs are the historical approved package, current requirements, and difference list. Outputs are the current referenced revision, material response, quantities/splits, inspections, and delivery confirmation. State “same revision, no technical changes” or “modified reorder,” linking changes to new approvals. After delivery, reconcile accepted totals and outstanding documentation, then incorporate results into the next retrievable baseline.
Before ordering, purchasing should confirm file retrievability, named approvers, and matching supplier acknowledgments. This locates issues faster than searching old attachments afterward. Keep old records identified as historical and define the new approved package's effective scope, preventing reorders from combining inconsistent files from different periods.
Source material and applicable scope
- Ucamco, “Gerber Format — Official Gerber Format Website”; version: online page, no fixed revision identified; checked 2026-10-18; relevant sections: Gerber layer files, attributes, and Job file responsibilities. Supports only definitions of manufacturing files and revision objects. This page's batch, visit, and logistics checklists are this site's purchasing-coordination methods, not original-vendor services or company commitments.
