When Climate Risk Outlasts Inventory, Supplier Diversification Becomes Urgent
A factory’s exposure to flooding, extreme heat or wildfire can flag a sourcing problem without establishing the right response. Protective measures may make continued supply acceptable. Another supplier may reduce dependence on that factory while sharing the same vulnerable transport routes or utilities. Procurement needs to establish how those exposures could interrupt production before deciding where to spend. The consequential comparison is between the time available and the time needed to restore supply. If inventories would run out before a supplier recovers or an alternative becomes operational, the buyer faces a continuity gap that a risk score alone cannot resolve.
Measure the risk left after protection
Charles Kwartnik, Head of Project and Customer Support, Product DNA, rejects a universal threshold for deciding when climate exposure warrants supplier diversification. “High exposure to flooding, extreme heat or wildfire should raise a flag, but it doesn't automatically mean you should switch suppliers,” he said in written responses to The Supply Chainer. His proposed assessment focuses on the risk remaining after realistic protective measures, both now and over the life of the purchasing contract. That shifts the decision from identifying a hazard to examining whether its operational consequences can be tolerated. The distinction matters when comparing mitigation and diversification. A protective investment may reduce disruption at an existing site, while another source may provide a way to continue supply when that site is unavailable. The useful comparison concerns what each option changes, how long it takes to become effective and which dependencies remain.
Kwartnik offers a practical test: determine whether inventories would be exhausted before the disruption ends or another source can be brought into operation. If so, he argues, diversification becomes a priority. The case strengthens where one supplier dominates supply, adaptation is limited or expensive, or the exposed site sits several tiers beyond the buyer’s direct contractual relationship.
An alternative needs a different failure path
Diversification can leave significant exposure intact if the new supplier depends on the same infrastructure. “And make sure the alternative isn't in the same risk zone or relying on the same transport routes and utilities,” Kwartnik said. That requirement broadens the sourcing comparison beyond factory locations. Different production sites may still depend on a shared gateway, access route or utility network. A buyer needs enough information to establish whether the proposed alternative would remain usable during the disruption it is intended to address.
Earlier coverage by The Supply Chainer examined the same dependency problem in transport planning. Nari Viswanathan, Head of Product Marketing and Solutions for Supply Chain and Direct Spend, Coupa, said: “If the primary and backup suppliers both depend on the canal, a second contract offers little protection from a transit delay.” His comments concerned shipping routes rather than physical climate assessment. They identify a relevant limitation: adding a contract does not necessarily add an independent way to keep production supplied. For climate-risk decisions, the alternative’s contribution depends on which shared exposures procurement has actually removed.
Locate production before scoring exposure
Kwartnik recommends starting a pilot assessment with one product line and a focused set of information: direct suppliers and working contacts, 12 months of orders, a breakdown of key materials and components, and the locations where they are manufactured. “For a pilot, precision matters more than quantity,” he said. The production-site requirement is important. A headquarters address can identify the supplier as a business while revealing little about the factory making the component. Kwartnik also advises checking locations on a map because postal addresses may indicate the nearest road rather than the plant itself. The analytical consequence is that inaccurate location data can undermine a detailed assessment before the buyer reaches the mitigation decision. Procurement may have identified the correct legal supplier but assessed the wrong physical exposure.
The product breakdown establishes a second connection: which site supplies which material. Without it, a map of exposed facilities does not establish which production requirements are at risk. Order history provides commercial context, while identifying difficult-to-replace components helps determine where deeper investigation deserves priority. Andy Grayland, Chief Information Security Officer, Silobreaker, adds an order-specific test for external risk assessments: establish the production facility, the order’s current stage, its actual transport route and the inventory available to absorb disruption. “Analysts should separate what is confirmed, what is assessed, and what is still unknown, and say so explicitly,” he said in responses to The Supply Chainer. His framework addresses external threats generally and can also inform climate-event assessment: monitoring may be appropriate when buffers can absorb the impact, while credible partial disruption may justify reallocating volume to a qualified alternative. A supplier change, he argues, should be reserved for high confidence of sustained disruption beyond available cover, or repeated events indicating a structural risk.
Extend the map where replacement is hardest
Kwartnik recommends beginning with direct suppliers, then moving quickly into the second and third tiers for materials that contribute most to the product or would be hardest to replace. That approach makes the pilot selective rather than exhaustive. Its purpose is to uncover consequential dependencies, including those the buyer can influence only through a direct supplier. His response provides a decision framework, rather than evidence that a particular assessment has prevented disruption. It supplies no quantified recovery assumptions or customer results. Those remain necessary inputs when applying the inventory test to an actual sourcing decision. The resulting responsibility is concrete: connect the exposed production site to the affected component, the available inventory and the time required for a workable alternative. A climate-risk flag becomes actionable when procurement can explain whether supply would resume before that inventory is exhausted, and what changes if it would not.
