What Your Balance Sheet Says About Supply Chain Execution

Every leadership team watches revenue, margin and earnings. But some of the clearest evidence of whether the operating model is actually working sits elsewhere: in inventory, receivables and the cash conversion cycle.

For supply chain leaders, those numbers are more than finance metrics. Rising inventory can reveal a breakdown between forecasting, procurement and production. Slower cash conversion can expose weak handoffs across sales, operations and finance. Read that way, the balance sheet becomes a report card on how well the supply chain and the broader operating model are executing together.

The current report card is not flattering. According to J.P. Morgan’s Working Capital Index, as reported in Forbes in June, 2026, S&P 1,500 companies were sitting on approximately $707 billion in trapped liquidity: cash locked in inventory, receivables and payables that could otherwise fund growth, reduce debt or return to shareholders. That figure is up 40% from pre-pandemic levels, and cash conversion cycles have lengthened by an average of 2.4 days.

These are America’s largest and most sophisticated companies, organizations with world-class treasury functions, enterprise resource planning systems and armies of analysts, and collectively they’re getting slower at converting operational activity into cash. In an era of expensive capital, $707 billion in trapped liquidity is one of the largest pools of unclaimed value in the economy, and it’s sitting inside companies that already own it.

Why hasn’t treasury fixed it? Because treasury can’t.

Working capital is created, and destroyed, at every cross-functional seam in the operating model. Look at where the deterioration actually happens:

Inventory rises when forecasting and procurement don’t operate as one system. Sales forecasts optimistically; supply chain buys defensively; production schedules around both. Each function behaves rationally against its own metrics, and the buffer for their misalignment shows up as inventory. Days of stock are, quite literally, a measurement of how much the functions distrust each other’s numbers.

Receivables stretch when commercial decisions are made without operational vetting. Terms get extended to close a quarter. Billing errors go uncorrected because order data was wrong at entry. Disputes sit unresolved because no single owner spans sales, service, and finance. Every extra day of days sales outstanding is a transcript of a handoff that failed.

Payables get managed as a lever precisely because the other two are broken, stretching suppliers to compensate for cash trapped upstream, which then degrades supplier performance and feeds back into inventory.

This is why the cash conversion cycle is such an honest metric. It can’t be improved by any single function acting alone. It improves only when forecasting, procurement, production, sales and finance execute as a linked system . It measures the one thing the P&L obscures: whether your operating model integrates or fragments.

Most working capital programs follow a familiar arc. Treasury or a consultant run a diagnostic, targets are set, a task force pushes hard for two or three quarters, and the metrics improve. Then the program ends, attention moves on, and within a year the gains have quietly eroded. The post-mortem blames volume mix or market conditions. The real cause is simpler: The program changed the numbers without changing the machinery that produces them.

One-time actions such as an inventory burn-down, a receivables blitz, or renegotiated terms harvest the symptom. They don’t touch the forecasting discipline, planning cadence, decision rights, or accountability structure that generated the trapped cash in the first place. Remove the task force, and the operating model resumes producing exactly the working capital profile it was designed, or rather never designed, to produce.

Operating model fixes hold because they change the system rather than the balance. That means linking the financial model to the operational model at the level of weekly management behavior: one integrated forecast that sales, operations and finance are jointly accountable to; terms and inventory policies set with operational input and enforced through the management cadence; variances in the cash cycle surfaced and worked at the same rhythm, and with the same seriousness, as variances in output or cost. When the management system inspects the drivers of working capital continuously, the balance sheet improvement becomes a byproduct of running the company well — and byproducts don’t erode when the project ends.

A global industrial biotechnology company had pursued successive treasury-led working capital programs, only to see the gains erode. Rebuilding its forecasting-to-fulfillment operating model connected demand planning, production and distribution through integrated systems, shared targets and clear accountability. Total inventory fell 54%, releasing cash and shortening the cash conversion cycle. Embedding those disciplines in routine management sustained the improvements well beyond the initial program.

For CEOs, this reframing offers something valuable: a diagnostic instrument you already own, updated every close, that grades execution more honestly than any internal survey or operational review deck.

Start with trend, not level. Industry structures differ, and benchmarking against peers has its place, but the most revealing question is directional: over the past eight to 12 quarters, is your cash conversion cycle lengthening or shortening, and do you know why? A lengthening cycle during a period of strategic change is an early warning that the operating model isn’t keeping pace with the strategy, that the seams are widening even as the narrative improves.

Then decompose the trend into its cross-functional stories. Which products or sites drive the inventory build, and what does that say about forecast integrity there? Where is DSO stretching, and were those terms decisions ever operationally vetted? Ask the questions in the language of execution, not finance, and insist that the answers come from the operating leaders, not from treasury.

Finally, treat any deterioration as a management system finding. If cash is getting trapped, some set of decisions is being made without cross-functional discipline, some cadence is failing to catch variances early, or some accountability is ambiguous. Fix that, and the cash follows, and stays.

The income statement tells you whether the strategy is producing results. The balance sheet can tell you whether the operating system behind those results is working. So the question for supply chain and finance leaders isn’t simply whether inventory or working capital is above target. It’s what those trends are telling you about forecasting, procurement, production, distribution and cross-functional accountability. When the cash conversion cycle deteriorates, the balance sheet is often identifying an execution problem before the organization has named it.

The grade is already on the report card. The question is whether the people running the operating system are reading it.

Mark Zeffiro is a managing partner at Brooks International.