ERP for Cable Assembly and Wire Harness Manufacturers: What to Require

Wire by the Foot: Units of Measure and Cut Lengths

Wire is purchased by the spool or by the foot and consumed in cut lengths with waste. Your ERP must store wire with a purchase unit, a stocking unit and a consumption unit, and convert between them without rounding errors on the BOM. Test a 500-piece order with 38 cut lengths: do the quantities per assembly, scrap factor and spool remainder produce a sensible requirement?

Remainders matter, since half a spool of M22759 wire is worth real money. Decide whether you track partial spools as lots with remaining length, which is usually necessary for aerospace and defense work.

• Multiple units of measure with conversion
• Scrap factor per component, not just per assembly
• Partial spool lots with remaining length
• Color and gauge as searchable attributes

BOMs and Drawing Revisions

A harness BOM is long, flat and heavily revised. The ERP should tie each BOM revision to the customer drawing revision, hold effectivity dates, and prevent a job from releasing against a superseded revision without an explicit override. Phantom or sub-assembly BOMs help for repeated sections such as a common connector pigtail, but harnesses with option content (variant cavities, alternative lengths) need a configurable or variant approach so you are not maintaining 40 near-identical BOMs.

Look for a way to import a BOM from the customer's spreadsheet or the CAD export instead of hand-keying it.

Lot Traceability From Spool to Serial Number

Aerospace, defense, medical and automotive customers often expect you to trace each shipped harness back to wire, terminal and connector lots, and sometimes to the operator, applicator and test result. That means lot assignment at receiving, lot selection at kit issue, and a genealogy report from serial number to component lots and back. Verify that the ERP can answer "which harnesses used this terminal lot" in seconds, because a supplier notice will ask exactly that.

Cut-and-strip operations that pull from several spools in one job are the hard case to test.

Kitting, Shortages and Long-Lead Connectors

Most harness delays come from a missing connector, seal or terminal, not from the shop floor. Look for MRP that nets consigned and purchased stock separately, shows shortages at kit level before a job releases, and tracks customer-supplied parts with their own ownership and valuation. If connector lead times run to months, you want planned buys against forecast and blanket orders with distributors, and a clear view of what is allocated to which sales order.

Quality, Test Data and Customer Documents

At minimum, store continuity and hipot results against the serial number, along with inspection sign-offs and any nonconformance. Many shops attach test reports and certificates of conformance to the job record. If your test equipment writes files, ask whether the ERP can ingest or link them, or you will keep an out-of-system folder.

For regulated work, check electronic signatures, document control and calibration tracking for crimp tools and testers.

• Test results per serial number
• Nonconformance and corrective action records
• Calibration due dates for gauges and testers
• Certificate of conformance generation

When a Simpler System Is Enough

If you build a few dozen repeat harnesses for a small number of customers without traceability requirements, a lighter shop system with disciplined item setup may serve you well, and a full ERP could become overhead. If you already run an ERP, do not replace it before checking whether AI can read the data you have: Netray builds private AI over existing ERPs such as SyteLine, NetSuite and others to answer shortage, margin and traceability questions without a new implementation.