The scaling test is a supply-chain test

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September 15, 2026

Over the next twelve months, the question of whether newer defense manufacturers can handle scaling up production of their products will be answered primar­ily through supply-chain performance. The challenge is no longer technological feasibility, as across the sector, companies have demonstrated capable solutions. The defining factor now is industrialization: Who can consistently deliver 10,000 engines (for example) on schedule while managing the realities of constrained suppliers, long-lead materials, workforce shortages, and competing demand across the defense ecosystem?

Scaling is a supply-chain problem, not an engineering one

A prototype proves the design works. It tells you almost nothing about whether you can build at rate. Those are different disciplines, and the gap between them is where new entrants fail. At low volume, a fragile supply chain looks fine. There’s time to absorb a late delivery, requalify a part, wait out a shortage.

Push the rate up and that slack disappears: Every weakness that was invisible at 10 units per month becomes a hard ceiling at 1,000. The company that scales is not the one with the most impressive component; it’s the one that spent its time on the least-glamorous work – the real work of understanding exactly which steps in its own process will break first under load and owning those steps rather than renting them.

The step you don’t control is the step that sets your ceiling

The discipline here is make-versus-buy, and the honest version of it is not to just say “make everything.” Vertical integration taken to its extreme is just an expensive way to be mediocre at a lot of things. Every manufacturer buys the commodity inputs – there’s no advantage in making your own raw stock or standard hardware, and pretending otherwise just raises your costs.

The line worth drawing is around the few processes where qualification is long, tolerances are unforgiving, and a second source can’t be stood up on short notice. That’s where the make-versus-buy decision stops being about cost and starts being about survival at rate.

Consider what a source failure actually costs on a defense program. On a commercial line, replacing a supplier is a purchase order and a first-article inspection. For a flight-critical rotating component, qualifying a new source is months of process validation, materials testing, and documentation – a period that’s frequently longer than the delivery window in the first place. A second source that takes fourteen months to stand up is not a hedge against disruption. It’s a plan for next year.

So the real make-versus-buy question isn’t unit cost. It’s recovery time, or how fast the company gets back to rate after a given supplier disappears. Where that answer runs longer than the contract allows, that’s not a supply chain – that’s a single point of failure with a purchase order attached. Those are the steps a serious manufacturer keeps in-house, and it’s why the companies that scale tend to own the hardest, least glamorous processes rather than renting a place in someone else’s queue.

Capital structure is a supply-chain decision

Here is the part of the scaling conversation that gets treated as a finance footnote when it’s actually operational. The reason so much venture and private-equity money is in this sector to begin with is that scaling manufacturing is expensive and someone has to fund the capacity ahead of the orders. How a company funds that capacity shapes what it can build and when.

Companies that fund expansion with their own capital rather than waiting on an outside round or a government award to de-risk it has a concrete supply-chain consequence: Such a move lets them build capacity ahead of demand instead of after it, on their own timeline rather than an investor’s or an appropriations cycle’s. In a production ramp-up, the lead time that’s bought by starting early is the lead time that doesn’t need to be explained later. In other words, the dependency that’s removed today is the delay that’s avoided in 18 months.

Put bluntly: A company that is turning down outside money while winning production contracts is telling you something about its confidence in its own numbers. That’s a signal worth reading.

What the government side should be asking

Company leaders evaluating a new entrant promising volume, don’t actually need to spend much time on the supplier list, as nearly everyone’s list looks fine on paper. Instead, they should ask which steps in the process the company physically controls, and what happens to its delivery rate if each outside supplier vanishes tomorrow. They should find out what has actually been qualified versus what is merely planned and should ask to walk the floor and count the machines. Moreover, they must take seriously the difference between a company that has built at rate before and one that has built a very good prototype and a very good slide.

That distinction is about to matter enormously. There is a great deal of new money and a great many new names in defense manufacturing right now, and the next year will sort the ones who deliver from the ones who looked promising. That sorting happens on the factory floor, in the qualification lab, and in the capital decisions made two years earlier – that sorting doesn’t happen in the marketing.

The industrial base gets stronger, specifically, when companies are willing to own the hard steps instead of assuming the queue will be there when the volume arrives.

Empty magazines are the actual threat

The urgency is real and it isn’t about any one company’s order book. The threats driving this demand are cheap. A cruise missile or a one-way attack drone can cost a small fraction of the interceptor sent to stop it, and an adversary willing to trade on that math can empty a magazine faster than it can be refilled. Recent conflicts have made the lesson concrete: Modern wars consume munitions at rates that outpace the industrial base’s capacity to replace them. The side that runs out first loses, regardless of who had the better technology on day one.

That reality reframes what scaling means. It is not a commercial growth story; production capacity is itself a deterrent – an adversary calculating the cost of a long fight has to weigh whether the U.S. can sustain one, and that calculation runs through factory floors, not just force structure. This reality is also why the demand is bipartisan and why the timelines are compressed. The concern in Washington isn’t whether U.S. companies can design the next munition. It’s whether companies can build enough of them, fast enough, to make the threat of running out an unattractive bet for anyone considering it.

This question puts the burden squarely back on the manufacturers. If production capacity is a national-security asset, then a company promising volume it can’t actually deliver isn’t just a business risk – it’s a readiness gap with a contract number on it.

Patrick Tynan is VP Operations, PBS Aerospace. Before his time at PBS Aerospace, Patrick worked for more than 10 years at ViaSat, where he was an engineer and system architect. He earned his BS and MS in electrical engineering from Georgia Institute of Technology and a Master of Advanced Study in architecture-based enterprise system engineering from University of California, San Diego.

PBS Aerospace    www.pbsaerospace.com/