Your Growing Inventory May Not Be a Supply Chain Problem
Manufacturing leaders often know when they have a working capital problem. Inventory rises. Cash tightens. Warehouses fill.
The natural reaction is to focus on the supply chain organization. After all, inventory sits on the balance sheet because someone purchased it, planned it, produced it, or stored it.
But in many cases, the core supply chain is not the source of the problem.
Recently, I worked with a manufacturer facing exactly this situation. Inventory levels had expanded significantly across raw materials, work-in-process, and finished goods. Leadership believed the supply chain function had lost control.
After a rapid one week assessment, we reached a different conclusion. The supply chain team was performing exactly as designed (in fact they were excellent).
The real issue was that the organization had created operating conditions that made inventory growth almost inevitable.
The Hidden Cost of Product Proliferation
Like many manufacturers, the company had expanded its product portfolio over time. New variants were introduced regularly to drive incremental revenue and to stimulate market demand. When revenue growth slowed they introduced even more variations to existing products, chasing the next dollar of sales.
On the surface, each launch appeared justified.
The problem was that every product also carried a commitment to rapid customer fulfillment. As the SKU portfolio expanded, the inventory required to support those service commitments expanded with it.
Each new product increased complexity. Each new variant required additional raw materials, safety stock, work-in-process, and finished goods coverage. The cumulative impact on working capital was substantial, but that cost was largely invisible during product approval decisions.
The organization was evaluating revenue potential. It was not evaluating the full cost of supporting that revenue.
When Forecasts Become Inventory
The situation was amplified by a second issue that is common across manufacturing organizations.
New product forecasts were consistently optimistic.
Demand assumptions flowed into the S&OP process, inventory was positioned to support those projections, and when products underperformed expectations, there was no systematic mechanism to quickly adjust inventory plans.
The result was predictable:
Inventory accumulated against demand that never materialized.
What began as an overly optimistic forecast eventually became a working capital problem.
The Real Lesson
The most important insight from this engagement was not about inventory management.
It was about organizational design.
Many of the factors that drive inventory levels originate outside the supply chain function:
Product portfolio decisions
New product introduction processes and integration
Service level commitments
Demand planning assumptions
New product introduction forecast governance
Supply chain teams are often asked to execute within constraints they did not create.
When those constraints are poorly designed, even highly capable supply chain organizations can produce undesirable outcomes.
Execution excellence cannot overcome structural flaws indefinitely.
Three Questions Every Manufacturing Leader Should Ask
If inventory is rising faster than revenue, leadership teams should look beyond traditional supply chain metrics and ask three broader questions.
1. Are product development decisions being made with full cost visibility?
Revenue projections matter, but so do inventory carrying costs, fulfillment requirements, sourcing complexity, potential returns and working capital implications.
A product that appears profitable on paper may create significant hidden costs across the value chain.
2. Is supply chain involved early enough in product development?
The ability to influence cost and complexity is greatest during product design.
When sourcing and supply chain teams are brought into the process after major decisions have already been made, much of the economic outcome has already been determined.
3. Does your planning process correct mistakes quickly?
Forecasts are predictions, not facts.
Organizations need mechanisms that rapidly identify underperforming launches and adjust inventory positions before excess inventory accumulates.
Supply chains should be designed to handle changes in demand.
Without that feedback loop, optimistic assumptions become expensive inventory.
Looking Beyond the Symptom
One of the most common mistakes organizations make is treating inventory as a supply chain problem. Inventory is often the symptom. The root cause is frequently found in product strategy, portfolio management, forecasting discipline, or cross-functional decision making.
Before asking what your supply chain team is doing wrong, ask a different question:
What operating conditions have we created that make this outcome predictable?
The answer may have far more impact on working capital than any inventory reduction initiative ever could.
End Results - The Fix
We partnered with the company to launch a SKU rationalization initiative focused on maximizing net operating income within existing working capital constraints. We also redesigned the forecasting process for new product introductions to improve demand accuracy and inventory planning discipline. As these changes took hold, the company reduced excess inventory, improved working capital performance, and returned to a sustainable path of profitable growth.
AI Disclosure:
Writing & Industry Experience: Greg Pitstick
Editing: ChatGPT
Image: ChatGPT