PCB assembly / Consignment and attrition
Consignment and attrition guidelines
Supply a full component kit or a partial kit, or let us source selected parts. When you provide your own components, these guidelines keep your build on schedule.
1. Kit preparation
How to package and label consigned parts so they go straight onto the line.
Labeling and organization
Label each bag, tray, reel, tube or carrier with the part number used on your BOM. Each assembly order needs its own kit. Multiple kits can ship together if they are physically separated and clearly marked.
Packaging and handling
We accept cut tape of any length, reels, tubes, trays and properly packaged parts. Protect components from moisture, ESD and damage with sealed moisture-barrier bags and antistatic packaging where appropriate.
Loose SMT parts
Loose or bulk SMT parts are strongly discouraged. They need special handling similar to through-hole placement, may incur extra fees and may need to be repackaged into trays or carriers for our machines.
Polarity and orientation
Parts with orientation requirements need visible polarity or pin-1 markings. If markings are unclear, include an assembly drawing or photo showing orientation.
Shipping
Send tracking numbers for every shipment of consigned material so we can schedule your assembly job accurately.
Unused components
Any unused customer-supplied components are returned with your completed boards.
2. Attrition standards
Assembly equipment needs extra parts for feeder setup and calibration, and to cover normal handling losses. We cannot start assembly until enough attrition stock is on hand, and a shortfall may put your order on hold.
Requirements differ between prototype and production builds to match how the machines are actually used.
Prototype builds: 100 PCBs or fewer per order
Prototypes involve more feeder resets, more manual touchpoints and more process variation. Please supply at least these overages:
SMT passive components
| Package size | Required overage | Example |
|---|---|---|
| 0603, 0805 | Required quantity + 20 parts | 40 needed, provide 60 |
| 0402 | Required quantity + 50 parts | 20 needed, provide 70 |
| 0201 | Required quantity + 50 parts | 60 needed, provide 110 |
Through-hole and mechanical parts
Required quantity + 5 parts per line item.
All other packages and specialized devices
Required quantity + 5%.
Note: If a component uses a small SMT package comparable to those listed above (such as 0201, 0402, 0603 or 0805), follow the overage for that package size rather than the general guidance. Small-format parts behave similarly during automated placement, and following the size-specific rules prevents setup delays and feeder shortages.
Production builds: more than 100 PCBs per order
In production, attrition scales with run size. Please supply:
SMT passive components
| Package size | Required overage | Example |
|---|---|---|
| 0603, 0805 | Required quantity + 10% | 2,000 needed, provide 2,200 |
| 0402 | Required quantity + 25% | 500 needed, provide 625 |
| 0201 | Required quantity + 50% | 2,000 needed, provide 3,000 |
Through-hole and mechanical parts
Required quantity + 2 parts per line item.
All other packages and specialized devices
Required quantity + 5%.
Note: If a component uses a small SMT package comparable to those listed above (such as 0201, 0402, 0603 or 0805), follow the overage for that package size rather than the general guidance. Small-format parts behave similarly during automated placement, and following the size-specific rules prevents setup delays and feeder shortages.
Questions about a consigned build?
Email contact@evertechinc.com with your BOM and kit details, or request a quote.