Draw the Venn diagram honestly and supply chain sits dead center between operations and finance — not as an operations function that happens to touch cash, but as the function where operational decisions and financial consequences are the same decision wearing two labels. Most org charts don't draw it that way. They file supply chain under operations and let finance find out what happened a reporting cycle later.

That arrangement has a cost, and the cost scales inversely with company size. At a billion-dollar manufacturer, the gap between an inventory decision and its cash impact is covered by a standing army: a supply-chain-finance analyst, an S&OP process, a finance team with the headcount to shadow every material purchasing call. At a fifteen-person company, none of that infrastructure exists. The gap doesn't get smaller — it gets personal. Somebody has to hold both lenses at once, and the question this piece is actually about is which seat that somebody should sit in.

What Supply Chain Actually Decides

Strip away the job title and look at the decisions: how much inventory to carry and in what mix, what payment terms to accept from a vendor, whether to forward-buy ahead of a price move, whether to make or buy a component, what safety stock to hold against a demand forecast that's wrong more often than anyone admits. Every one of these is a cash decision with an operational costume on. The operational question — will we have enough product to ship — is real, but it's the second question. The first question is whether the company has the cash to make that bet and still make payroll in six weeks.

An operations leader, correctly incentivized, optimizes for service level and throughput. That is their job, and a good one does it well. What they are not positioned to see — because it is not their job to see it — is the 13-week cash forecast that bet just collided with. That's not a knock on operations leadership. It's a statement about which function is structurally positioned to hold the cash view, and at a small company, that function is finance.

The Translation Lag That Kills Small Companies

The operational misstep is rarely what sinks a small company. A slightly wrong safety stock number, a vendor who ships three days late — these are recoverable. What's not recoverable is the lag between the decision and someone with cash authority noticing its consequence. Call it the translation lag: the number of days between a supply chain decision and the moment someone finance-side sees its effect in a forecast.

In a well-run finance-first organization, that lag is close to zero — the person making the inventory call and the person watching the cash position are either the same person or sit in the same weekly meeting looking at the same model. In an operations-led structure without dedicated finance support, the lag is often "whenever it shows up in the bank balance." By the time a forward-buy shows up as a cash crunch, the decision is six weeks old and already irreversible. The fix isn't a better forecast. It's collapsing the distance between the decision and the person who owns the consequence.

“The question was never whether supply chain belongs to operations or finance. It's which function can see six weeks of cash out before the business runs into a wall — and whose desk the phone rings on when it does.”

Four Signs You've Outgrown Operations-Led Supply Chain

This isn't a universal rule — it's a fit question, and fit changes with scale. Here's the checklist I use to tell whether a company has outgrown the arrangement:

  • No dedicated finance partner translating ops decisions into cash impact. If nobody's job is explicitly to sit between supply chain and the cash forecast, the translation lag defaults to "eventually."
  • Inventory is a material share of working capital. Once inventory is eating a large piece of current assets, every inventory call is a capital allocation call, not a merchandising call, whether anyone's labeled it that way or not.
  • Vendor negotiation has quietly become cash management. If "renegotiate terms" is really code for "stretch payables to make payroll," the function is already doing finance's job without finance's authority or visibility.
  • Demand planning and the cash forecast run on separate clocks. If supply and demand planning happens on one cadence and the 13-week cash forecast happens on another, with no formal link between them, surprises are a matter of when, not if.

Two or more of these true, and the org-chart question answers itself: supply chain belongs under finance, regardless of what the chart currently says.

Where This Reverses

The case flips once the infrastructure catches up. A company that has built a real finance function — a dedicated supply-chain-finance analyst, a working S&OP cadence, real-time visibility between inventory and cash — no longer needs one person holding both lenses personally, because the translation layer has become a process instead of a personality. At that point, specialization starts to outperform the combined role, and a strong operations leader paired with a strong finance partner usually beats one person trying to be both. The combined structure isn't a permanent answer. It's the right answer for exactly as long as the company can't yet afford the translation layer as its own function.

The Practitioner Takeaway

Small companies don't get to choose whether supply chain has financial consequences — they only get to choose how fast someone with cash authority finds out about them. Folding the function under finance isn't a power grab or an org-chart preference. It's an admission that at small scale, the company can't afford the lag between an operational bet and someone noticing what it did to the cash position. Supply chain was never really an operations function with financial implications. At the size where most companies actually live, it's a finance function that happens to require a hard hat.