Q: How to evaluate traceability systems of PCBA manufacturers? Many suppliers claim traceability capability but only achieve batch-level traceability instead of unit-level traceability. What is the difference between unit-level and batch-level traceability? Can Juehui Industry’s traceability system meet the requirements of medical and other high-reliability products?

A: Traceability specifications for medical PCBA are far stricter than those for ordinary consumer electronics. Under the ISO13485 quality system, each PCBA shall be traceable to raw material lots, production equipment, operators, process parameters and full inspection data. Records must be retained for a minimum of 15 years.

However, many PCBA manufacturers on the market only implement batch-level traceability. When quality defects occur, they can only check the material batch used for the whole production run, without locating individual boards or specific components on each PCBA. The gap between unit-level and batch-level traceability becomes obvious during quality incidents.

1. Batch-level Traceability: Traceable Only to the Whole Batch

Batch-level traceability only retrieves material information for an entire batch of PCBA, without isolating a single board. Once a material risk emerges, manufacturers have to recall or scrap the whole batch. It is impossible to accurately identify affected units, leading to substantial material loss and schedule delays.

2. Unit-level Traceability: Precise Tracking Down to Each Single Board

Unit-level traceability assigns a unique SN code to every PCBA. It enables traceability of the batch of each critical component, equipment ID, operator, real-time process parameters and full inspection data for the individual board.

Powered by the MES manufacturing execution system, Juehui Industry delivers a unit-level traceability solution. Every medical PCBA carries a unique identity tag. Material lots, production parameters and raw inspection data from all manufacturing stages are available for online access.

3. Core Value of Unit-level Traceability for Medical Customers

When component suppliers notify quality risks of a certain material batch, unit-level traceability quickly filters all PCBA assembled with that batch of components. It supports targeted recall instead of full batch scrappage.

During on-site customer audits, complete production and test records for a specified batch or SN code can be retrieved. Juehui Industry can pull full raw process data for a single board within 5 minutes to streamline NMPA and FDA reviews.

4. Standards for Traceability Data Retention

- Consumer electronics: data retained for 2–5 years

- Industrial control products: data retained for more than 5 years

- Automotive electronics and medical devices: data retained for more than 15 years

Juehui Industry stores traceability records of medical PCBA projects for over 15 years, fully complying with NMPA and FDA audit requirements.

5. Key Checkpoints for PCBA Traceability System Assessment

1. Does the system support unit-level traceability or merely batch-level traceability?

2. Is a unique SN code assigned to each PCBA?

3. Can the system trace material lots, production equipment, operators and process parameters?

4. How long will the traceability data be preserved?

5. Can full raw production data be quickly retrieved during customer audits?

PCBA Manufacturing Capabilities of Juehui Industry

Juehui Industry fulfills all the above requirements: full-lifecycle unit-level traceability, unique SN binding for each board, accessible data across all processes, 15-year long-term data archiving and 5-minute rapid data retrieval.

When placing orders for medical projects, please note Medical + Special Traceability Requirements. Our engineers will develop a customized unit-level traceability plan for your project.

As a one-stop high-precision PCBA manufacturer based in Shenzhen, Juehui Industry adopts medical-grade quality control standards for production. Beyond the self-developed unit-level traceability system, we provide precision fabrication for 2–32 layer conventional PCBs and 1–5 order high-layer HDI boards. We mass-produce advanced technologies including laser blind & buried vias, resin plugging, back drilling and step boards, and handle ultra-miniature 01005 component precision placement.

We provide full-spectrum services covering PCB fabrication, component sourcing, precision SMT assembly, functional testing, aging and conformal coating. Combined with our digital traceability & QC system, we deliver reliable solutions for medical electronics, AI computing hardware, micro sensors, wearable devices, industrial controls and other high-end sectors.