How to qualify a new supplier in 30 days
Supply chains move fast, and qualification shouldn’t be the bottleneck. Here’s a pragmatic, four-week playbook you can use to qualify a copper wire supplier without cutting corners on quality, cost, or compliance.
Week 1 — Paper + Process (don’t skip this)
Goal: Prove the supplier can meet your spec on paper and in process.
Ask for (and review)
Capabilities matrix: gauges, constructions (single-end, bunched, rope-lays, MCM, etc.), finishes (BC/TC/NPC), put-ups (returnable reels, cardboard basket).
Quality system & controls: inline laser-length control + weight-to-length reconciliation, plating thickness measurement, calibration records.
Certs & compliance: ISO, CoC, RoHS/REACH, USMCA, EMRT, CMRT.
Commercial clarity: pricing formula (COMEX basis for shipping month, rod premium by terms, fab adder, plating surcharge), Incoterms, payment terms, standard lead times, MOQs.
Specs: Can the supplier produce according to your needed specs?
Decide: Green-light samples.
Week 2 — Samples that prove it on your line
Goal: Validate the conductor in your process with your tools. Request samples (hand samples or reels) for your top runners.
Run quick, meaningful tests
Incoming: OD and DC resistance vs. print; strand count/lay length; plating thickness spot-check.
Termination: Crimp height window & pull test on your lugs/ferrules; solderability if applicable.
Mechanical: Bend radius/flex cycles relevant to your install; jacket trial if you over-extrude; reel pay-off behavior (no spring-off or birdcage).
Documentation fit: Does labeling map cleanly into your ERP? Are certs complete without email back-and-forth?
Decide: Green-light a pilot PO for a controlled, production-relevant quantity.
Week 3 — Pilot PO under real conditions
Goal: Verify repeatability, delivery discipline, and communication.
Order one or two SKUs you’ll actually run. Track:
OTIF to your dock and promised date.
Footage accuracy (laser-length reported vs. your receipt) cross-checked by weight-to-length.
Scrap & rework vs. your current baseline (connector rejects, OD sizing in extrusion).
Communication: proactive ship notice, cert packet accuracy, responsiveness on questions.
If anything drifts, issue a supplier CAR and see how fast they contain, correct, and prevent.
Week 4 — Decision
Goal: Lock in or pass—based on data.
Scorecard (keep it simple)
Quality: pass/fail on tests.
Cost transparency: pricing formula matches your policy.
Service: quote speed, OTIF, documentation accuracy, flexibility on put-ups.
Risk: capacity for your forecast; disaster recovery; second plant or dual equipment.
Why teams choose Sark Wire for fast quals
Process control you can audit
Constructions that fit your print
Put-ups for your cells
No-mystery pricing
Samples in days, pilot POs in weeks
Excellent service every step of the way