Latest / The Buyer's Side with Fexingo: Procurement, Sourcing, and B2B Purchasing Decisions / How One Buyer Used Supplier Diversification to Beat a Copper Shortage
Transcript
- Lucas: So a few weeks ago, copper hit eleven thousand dollars per metric ton — up about 35 percent from the start of the year. And a lot of procurement teams that rely on copper-heavy inputs started sweating. Luna: Yeah, I remember seeing that. A lot of the coverage focused on the macro — supply deficits, export restrictions out of Chile. But I imagine the real pain was at the buyer level. Lucas: Exactly. I want to talk about one specific case — a mid-sized automotive parts manufacturer in the Midwest. They do about 400 million in annual revenue, and copper is in nearly every product they make. Wiring harnesses, connectors, motor windings. They had one primary supplier for their highest-volume copper alloy — a mill in Ohio that had been their partner for over a decade. Luna: Classic single-source situation. And when the price spike hit, that supplier couldn't ramp up fast enough? They were probably already at capacity. Lucas: Right. The Ohio mill could only allocate about 70 percent of the buyer's normal monthly volume. The buyer was staring at a production shortfall of roughly 30,000 pounds of copper alloy that quarter. That's enough to halt two production lines. So the procurement director — I'll call her Sarah — had to move fast. Luna: What was her first move? Did she have a backup supplier already qualified, or was this a scramble? Lucas: Partially a scramble. She had a list of three potential secondary suppliers from a sourcing study done two years earlier, but none were fully qualified. So she had to compress a qualification process that normally takes six months into about eight weeks. And she had to do it while managing the existing supplier relationship — she didn't want to burn that bridge. Luna: That's a tough balance. How do you tell a long-term partner, 'Hey, we need to diversify away from you,' without making them feel like you're about to drop them entirely? Lucas: Sarah framed it as a shared risk problem. She went to the Ohio mill and said, 'We both know the market is volatile. If we have a second qualified source, it takes pressure off your plant when demand spikes. You don't have to overinvest in capacity for our peaks.' The supplier actually agreed — they could see the logic. Luna: So that opened the door. Who were the candidates on her list? Lucas: One was a mill in northern Vietnam, another was in central Mexico. The third was a us based specialty alloy producer, but their lead time was twelve weeks — too slow for Sarah's needs. So she focused on Vietnam and Mexico. Both could deliver in six to eight weeks, compared to the Ohio mill's four weeks. Luna: Eight weeks is a long time if you're used to four. Did she have to carry more inventory? Lucas: She did. She negotiated a 60-day rolling buffer with the Ohio mill to cover the qualification gap, and she started building a safety stock of the secondary supplier's material even before qualification was complete. That increased her working capital tied up in copper inventory by about 15 percent temporarily. Luna: Which is a hard sell to the CFO. But I guess the alternative — lost production — would have been worse. Lucas: Much worse. Sarah estimated a two-week line shutdown would cost about 1.8 million in lost margin. The incremental inventory cost was about 300,000. So the math was clear. Luna: Before we go deeper into the qualification process, I want to pause on something. This kind of practical, nuts and bolts analysis — understanding how a real buyer navigated a real crisis — is exactly why we do this show. If today's episode moves your thinking forward even a little, the way this stays ad-free and independent is listener support. Lucas: Yeah, it's a small thing that makes a big difference. If you've gotten value from episodes like this one, head over to buy me a coffee dot com slash fexingo. That's buy me a coffee dot com slash fexingo. And thank you — it genuinely helps us keep bringing you these stories. Luna: Alright, back to Sarah's playbook. So she's got two candidates — Vietnam and Mexico. How did she decide between them? Lucas: She didn't choose one. She qualified both. Her reasoning was that if you're diversifying, you don't want to just replace one single-source with another. You want at least two alternatives. So she ran parallel qualification processes. Luna: That doubles the qualification cost, right? Audits, samples, testing — it's not cheap. Lucas: Sarah's team estimated about 80,000 per new supplier for full qualification. So 160,000 total. But she viewed it as an insurance premium. And she structured the contracts so that each secondary supplier would get a minimum volume commitment — about 15 percent of her monthly needs each — with the option to increase to 25 percent if the Ohio mill couldn't deliver. Luna: So the Ohio mill kept about 70 percent of the business, but with a contractual floor. That seems fair. Lucas: Exactly. And the secondary suppliers got a guaranteed baseline, which made them willing to invest in the relationship — they set aside dedicated production slots for Sarah's company. Luna: Let's talk about the actual qualification. What were the biggest hurdles? Lucas: For Vietnam, the biggest issue was certification. The mill had the right ISO standards, but they hadn't been audited by any of the major automotive OEMs that Sarah's company supplied. So Sarah had to bring in a third-party auditor to verify their quality management system against IATF 16949 — that's the automotive-specific standard. Luna: That's a deep dive. And Mexico? Lucas: Mexico was closer, both geographically and in terms of certification. They already had IATF 16949. But their challenge was lead time variability. Their stated lead time was six weeks, but Sarah's team found that during peak periods it could slip to nine. So she negotiated a penalty clause — if they missed the six-week window by more than a week, they'd cover the cost of expedited shipping. Luna: That's a smart way to force reliability. Did she run into any geopolitical concerns with Vietnam? Tariffs, shipping lanes, that kind of thing? Lucas: She did. In early 2026, there's still uncertainty around US trade policy with Southeast Asia. So she built in a cost-adjustment clause tied to tariff changes — if duties increased, the price would be renegotiated quarterly. She also required the Vietnam supplier to hold an extra two weeks of inventory at a bonded warehouse in the US, so a shipping disruption wouldn't immediately hit production. Luna: That's a creative workaround. It shifts some inventory cost to the supplier, but they get a longer-term contract. Lucas: Right. And it worked. By the end of the eight weeks, both suppliers were qualified. The first shipment from Mexico arrived in week nine, and Vietnam's first shipment came in week eleven. Sarah had built enough buffer inventory to avoid any line stoppages. Luna: So the copper price eventually came down — it's around ninety-two hundred now, I think — but the diversification is still in place. Lucas: It is, and that's the key. Sarah didn't treat this as a temporary fix. She's now making supplier diversification a permanent part of her sourcing strategy for any commodity that represents more than 5 percent of her direct material spend. Copper was 8 percent. Luna: So what's the lesson for other procurement teams? If you're sitting on a single-source situation right now, what's the first step? Lucas: Map your dependency. Sarah knew her Ohio mill was critical, but she hadn't quantified the replacement timeline. Once she did — six months to qualify a new source — she realized she was exposed. So start by asking: if my primary supplier cut allocation by 30 percent tomorrow, how long before I have to stop a line? If the answer is less than 90 days, you need to start the diversification process now, not when the crisis hits. Luna: And don't assume your current supplier will be upset. Sarah turned it into a partnership conversation. Lucas: Exactly. Most suppliers understand that a healthy buyer has options. The ones that push back are often the ones who know they're vulnerable — and that's a signal you should diversify even faster. Luna: Good point. Alright, next episode we're going to look at something a bit different — how one procurement team used a supplier-managed inventory model to reduce their own warehousing costs by 40 percent. Lucas: That's a good one. Thanks for listening, and we'll see you next time.