Global diesel inventories just hit a 44-year low for this time of year. The number that matters isn’t how much is left – it’s how long it lasts.
The world has a diesel problem.
According to Reuters, global diesel supplies have tightened sharply as conflicts in Iran and Ukraine disrupt supply and inventories fall to historic lows. U.S. diesel inventories fell to 107.9 million barrels by September 11, the lowest level for this time of year since records began in 1982, and the Energy Information Administration expects them to stay unusually low through much of 2027. Those are big numbers, but for the companies, farmers, manufacturers and transportation businesses that depend on diesel, 107.9 million barrels isn’t actually the most important one.
The more important question is simpler: how long will it last.
That’s a question every manufacturer should be asking about its own operation — not just how much inventory it has, but how much time that inventory actually buys. We call that Operating Runway.
Inventory is a quantity. Operating Runway is a decision.
Imagine two plants each have 10,000 units of a critical component in inventory; on an inventory report, they look identical.
Plant A consumes 500 units per day and has a highly reliable replenishment arriving in five days. Plant B consumes 1,500 units per day. Its next shipment is scheduled in eight days, the supplier has been running late, and a major customer order was just added to next week’s production schedule.
Same inventory. Completely different risk. Plant A has visibility and time; Plant B has a decision to make.
That’s why we believe manufacturers need to think beyond inventory visibility toward Operating Runway: how long can the operation continue before a critical dependency becomes a constraint? That dependency could be raw material, packaging, a component, labor, tooling, warehouse capacity, transportation, a machine, or even diesel. The specific constraint changes; the question does not.
The Gap is where the risk hides
We write frequently about the Gap: the distance between what your systems believe is happening and what is actually happening on the floor.
Your ERP might say you have 10,000 units, that they’re available, that production will consume 1,000 tomorrow, and that the next shipment arrives Thursday as planned. Whether any of that is actually true — right down to whether anyone could physically find the material in the warehouse — is a different question entirely. Every one of those differences changes your Operating Runway, and a small Gap can have an enormous consequence.
Walk the floor at a plant carrying that same 10,000 units and you’ll usually find something the report doesn’t show: a receiving clerk keying in a delivery from memory because the barcode scanner has been broken since Tuesday, or a pallet of the component sitting in a corner marked “quality hold” that never made it back into the count. Nobody lied on the inventory report. Nobody had a reason to check.
Imagine your ERP indicates you have 8.5 days of material remaining, but actual consumption on the floor has increased, some inventory is sitting in quality hold, a large customer order was moved forward, and your supplier has been slipping its delivery dates. Your real Operating Runway may be 6.2 days.
That 2.3 day Gap could be the difference between a routine replenishment and a production shutdown. The problem wasn’t that your inventory report was completely wrong. It was incomplete.
The Big Five establish Operational Truth
This is why we developed what we call the Big Five of Operational Truth. Before you can confidently calculate how much runway you have, you need to answer five basic questions.
1. What do you have?
Not what last night’s report says you have. What material, work in process, finished goods, labor and productive capacity actually exist right now?
2. Where is it?
Inventory that technically exists but is sitting in quality inspection, at another plant, in transit or somewhere nobody can find does not provide the same Operating Runway as inventory sitting beside the production line. Location changes availability.
3. Who is using it?
Which production orders, lines, customers and products depend on the resource? Ten thousand units can look like plenty until three major orders are competing for the same inventory.
4. Is it where Syspro thought it would be?
This is where the Gap becomes visible. Did the material move the way the ERP expected, did the receipt actually occur, did production consume what the routing assumed, did the supplier ship on time, and did actual yield match the standard? Any one of those breaking quietly changes the number.
The ERP contains the plan. The factory contains reality. Operating Runway depends on understanding the difference, which is exactly what TransLution’s real-time Syspro integration is built to close.
5. What is it costing you?
What happens economically when the runway gets short — expediting material, paying overtime, switching suppliers, paying premium freight, or, in the worst case, stopping the line? The closer you get to the end of the runway, the fewer choices remain and the more expensive those choices tend to become.
A shortage doesn’t begin when you run out
This may be the most important idea here: a shortage doesn’t begin when the last pallet disappears. By then, the important decisions have probably already been made for you.
The shortage begins earlier — a supplier slips a delivery date, consumption increases, a large order enters the schedule. Individually, none of those events necessarily stops production. Together, they shorten the runway.
The value of Operational Truth is recognizing that pattern while there is still time to do something about it.
Your Operating Runway should move every day
This shouldn’t be another static KPI sitting untouched on a dashboard. Imagine opening your production system and seeing:
- Operating Runway: 6.2 days
- Yesterday: 8.1 days
- Next confirmed replenishment: 8.5 days
- Supplier on time delivery trend: declining
- Revenue dependent on material: $740,000
- Recommended decision window: 48 hours
Now compare that with:
Inventory on hand: 18,400 units
Both may be technically accurate. Only one helps you make a decision.
Even better, imagine knowing:
- If the supplier shipment arrives on time, production continues normally.
- If it slips by 24 hours, Order 417 becomes exposed.
- If it slips by 48 hours, Line 4 stops Thursday afternoon.
Now management can evaluate choices while choices still exist. That is the difference between reporting and Operational Intelligence.
Time changes the value of information
We recently wrote that an inventory report tells you what you have, but it does not tell you when production stops. Operating Runway takes that idea one step further.
The value of information changes depending on when you receive it. Knowing today that a component will create a constraint in three weeks gives you options: expedite the existing order, qualify another supplier, or adjust the production schedule to protect the customer commitment before it becomes a broken promise.
Discover the same problem three hours before the line stops and most of those options disappear.
The information did not necessarily change. The value of the information did. Because time creates options.
Predictability = Visibility + Control
This is why we define manufacturing predictability so simply:
Predictability = Visibility + Control
Visibility means knowing what is actually happening. Control means having enough time and enough options to do something about it. Operating Runway connects the two — it takes Operational Truth and adds time.
In practice, it means knowing what you actually have, how quickly you’re consuming it, what else depends on it, when replenishment will actually arrive, when the Gap becomes operationally important, and how much time remains to intervene.
Nobody can predict every geopolitical conflict, supplier failure, weather event, transportation disruption or change in customer demand. The realistic goal is understanding your own operation well enough that external uncertainty doesn’t automatically become internal chaos.
The goal is not more inventory
Better Operating Runway visibility may actually let manufacturers carry less inventory, not more. Excess inventory consumes cash, occupies space, and can quietly become obsolete.
Companies frequently carry additional inventory because they do not trust their own information. If you cannot confidently answer what you have, where it is, how quickly it is being consumed and when replenishment will actually arrive, more inventory becomes insurance against uncertainty.
Better Operational Truth changes that equation. The objective becomes confidence in the decision, not the size of the stockpile.
The cheapest component can have the shortest runway
There’s another trap worth naming: manufacturers naturally pay the most attention to expensive inventory, but the item consuming the most working capital is not necessarily the item carrying the greatest production risk.
A five dollar component can stop a fifty thousand dollar finished product. A packaging material representing a tiny percentage of product cost can shut down an entire food production line. A supplier representing one percent of annual spend can support products representing 40 percent of revenue.
So Operating Runway should be prioritized by dependency, not just inventory value. That means asking what actually stops if this runs out, how quickly, how hard the resource is to replace, how much revenue depends on it, and how much time there would be to respond. That turns inventory management into a much more strategic conversation.
The constraint moves
Diesel is today’s example. Tomorrow it might be packaging, next month an electronic component, and after that, labor or a machine. Manufacturing will always have constraints, and the most important one is rarely permanent — it moves.
The question that actually matters is what runs out of runway next.
That’s where Operational Intelligence becomes powerful — not another dashboard explaining what happened yesterday, but a system that helps management understand what changed, what’s affected, how much time is left, and when a decision needs to be made.
Don’t tell me how much I have. Tell me how much time I have.
The global diesel shortage is an enormous, complicated supply chain problem. But the lesson for manufacturers is remarkably simple.
Knowing how much of something exists is useful. Knowing how long it will last is better. Knowing what happens when it runs out is better still. And knowing early enough to do something about it is where information finally becomes valuable.
That is Operating Runway. It starts with the Big Five of Operational Truth. It exposes the Gap between the system and the floor. And it gives management the one thing every manufacturer needs when uncertainty increases: time to act.
Because ultimately, predictability isn’t knowing exactly what will happen. It is seeing what could happen early enough that you still have a choice.
Frequently asked questions
Operating Runway is how long a manufacturing operation can keep running before a critical dependency, such as a raw material, component, labor pool or piece of equipment, becomes a constraint. It goes beyond a simple inventory count by combining what you have with how fast you are consuming it and when the next reliable replenishment arrives.
An inventory report tells you a quantity on hand at a point in time. Operating Runway tells you how many days that quantity will actually last given current consumption, known demand and confirmed replenishment dates. Two plants can show identical inventory and have completely different runway depending on consumption rate and supplier reliability.
The Gap is the difference between what an ERP system believes is happening and what is actually happening on the production floor. A small Gap, such as inventory sitting in quality hold or a supplier running late, can shorten Operating Runway by days and turn a routine replenishment into a production shutdown.
The Big Five are what do you have, where is it, who is using it, is it where Syspro thought it would be, and what is it costing you. Answering all five in real time is what allows a manufacturer to calculate a trustworthy Operating Runway rather than relying on a static inventory count.
No. Many manufacturers carry excess inventory as insurance against uncertainty because they do not trust their own data. Real time visibility into Operating Runway, built on accurate Syspro data, often allows manufacturers to carry less inventory with more confidence, freeing up cash without adding production risk.
See your own Operating Runway
TransLution connects real time floor data directly to Syspro, so your inventory reports reflect what is actually happening in your plant, not just what was expected to happen. See how manufacturers like LANCEWOOD closed their own Gap in the Predictability = Visibility + Control case study, or browse more results in our case studies.
Ready to see your own Operating Runway? Request a free custom demo and find out how much time your inventory is really buying you.
Sources and further reading
- Reuters, September 21, 2026: Global diesel shortage likely to last into 2027 as storage tanks drain.
- TransLution Software: Your Inventory Report Tells You What You Have. It Doesn’t Tell You When Production Stops.
- TransLution Software: You Can’t Cut What You Can’t See.
- TransLution Software: The Big Five of Operational Truth.
- TransLution Software: Predictability = Visibility + Control: The LANCEWOOD Case Study.
