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Wednesday, May 21, 2025

Ship Order Quantities

Continuing on a little bit of an acquisition theme, we have become conditioned to think of military acquisition ordering, specifically ship ordering, as occurring in large quantities.  For example, here’s some planned or built orders for some classes:
 

 

 














But, this was not always the case.  In fact, this is an anomaly in the history of the Navy.  Historically, most shipbuilding programs resulted in small orders.  Consider the following sequential list of combat ship types in the WWII era and note the size of each class, as shown in the table below.



 


































We see that even in the midst of an emergency wartime crash construction program that would see the Navy ultimately build a fleet of 6000 ships, the individual class sizes were still very small … stunningly small by today’s norm.
 
Even the smaller ships, of which the Navy needed many hundreds, were built in fairly small quantities as shown below.
 


 














Even these larger destroyer and destroyer escort class numbers are deceptive in that they were all built in the span of a few years.  Thus, although the numbers may have been larger, the construction period for the classes was very short which is almost the same as being a very small class as far as how it impacts ordering, construction, and pricing.  Contrast this with the LCS class, a corvette size ship, which has been under construction for some twenty years or the 3-ship Zumwalt class which began construction in 2009 and is still continuing, sixteen years later!
 
 
Future Proofing
 
One of the major impacts of class size has to do with the misguided notion of future proofing, the concept so beloved by so many naval observers.  The idea of future proofing is that if we build excess capacities (weight margin, electrical power, internal hull volume, hull length, extra cabling and ducting, etc.) into the new ship it will be much cheaper to upgrade it in the future as new technologies emerge.  While superficially appealing, the concept has failed almost completely in practice and has resulted in more expensive ships that never get ‘futured’, meaning, they never receive those nebulous, undefined future upgrades.
 
Future proofing results in compartments that have no function, cables and ducting that are dead ends, and length, width, and volume added to the ship for future needs that, history tells us with near 100% certainty, will never happen.  In short, we increase the cost of ships trying to future proof them despite knowing full well that we’ll never apply the future upgrades.  Instead, when the time comes for adding future upgrades, the Navy will claim, as they always do, the ships are too old and that it is no longer cost effective to upgrade the ship and that the ship is too worn out to be worth upgrading and that we must buy new hulls.  How many times have we seen this happen and yet naval observers keep calling for future proof designs?  Remind me, what’s the definition of insanity?  Oh yeah, that’s right …
 
In WWII, there was zero future proofing built into ships.  Future proofing, meaning the incorporation of new technology, was handled by building small classes so frequently that classes with new technologies (or the lessons of actual combat) were always just around the corner.
 
 
Order Size
 
One might think that industry would love large orders and, in theory, that would be correct if the Navy ever followed through on the large order (see, “Follow Through”).  In theory, large orders would lend stability to shipbuilders since they could plan years ahead for their workloads, better manage workforce levels, and intelligently plan facility improvements.  Of course, this is not what happens in practice.  In practice, shipbuilders are left unsure about future workloads since every program is always on the verge of being cancelled or reduced, orders surge and wane resulting in frantic attempts to hire workers followed shortly by layoffs, and facility improvements and, indeed, basic maintenance, keeps getting pushed into an undefined ‘someday’ that never arrives.  What’s the point of large orders that just get cancelled or reduced?
 
Contrary to what one might think, small orders actually promote stability in the shipbuilding industry because industry has a much higher confidence that the order will be fully carried to completion and that subsequent small orders are coming.
 
Large orders have had the effect of reducing new classes and new projects to near zero.  For example, we’re down to one new combat aircraft order every twenty or thirty years now.  This results in one winner in industry getting all the work for decades (Lockheed Martin and the F-35, for example) and the other manufacturers being forced to consolidate and/or die due to lack of work.
 
It is time to return to the historically more normal practice of building frequent, small classes of ships with short life spans (10-20 years).  We knew this, once upon a time, but stupidly abandoned timeless wisdom.  Let’s study our history, recall the lessons, and return to sanity.

16 comments:

  1. You realise these ships were built during the treaty era right?

    The Heavy Cruisers were limited to 10k tonnes displacement and the USN tried to get the most bang for their buck so 10 guns on the Pensacola but it limited secondary and AA armament so they went to 3 triples and constantly revised the design.

    When war started and treatry restrictions no longer applied they went straight to 14 Baltimore class ships with 3000 tonnes more displacement and built in just 5 years 5 months. The Cleveland class had 27 completed of 52 ordered with it's predecessor having 9 ships.

    The treaty restrictions limited a lot.

    As to future proofing they did try but tech was evolving so much faster with new threats appearing nearly every year not to mention your favourite sensors and fire control which improved leaps and bounds over what was a short period of time.

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    1. Need an edit button!

      Not only did the treaties limit size but quantity you could only have I believe 18 for the US in the case of heavy cruisers.

      The UK had a single 'class' with subclasses with as much difference as the Northampton, Portland and New Orleans classes did.

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  2. By golly, they ordered the Burkes in bulk, didn't they?

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    1. With no end in sight. We're going to have to start labeling the Flights with exponential notation.

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    2. BuBurke is the most politically savvy unit in the USN.

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  3. Mass production of some things is really difficult.

    Look at all the problems that Ford had at Willow Run. There has never been anybody who was better at assembly line mass production than the Ford Motor Co. of Henry Ford.

    But they struggled mightily to get the B-24 program off the ground. The Army Air Corps kept changing the design due to combat experience, which necessitated constant design and tooling changes, frustrating the attempts at mass production efficiency.

    I think it's even harder with warships. These are massive machines and a lot of the work that needs to be done ends up being a form of custom work.

    It's unlikely to have a big enough production run to standardize and mass produce all the things like hull plates en masse like a modern Liberty ship program.

    Replicating Kaiser's achievement is really unlikely, and honestly, what really is gained?

    You can set up the jig to bend a particular hull plate to make 50 of them to cover the entire production run.
    Assuming that your blueprint is accurate enough to not have to adapt the design slightly, it might still be cheaper to set up the jig every time than to pay for warehousing space for all the plates until they are finally used (in that particular example).

    And much of the components that go into the ship are going to be the same regardless of design change.
    How different is the LM2500 engine going to be between different designs? The fresh water condensers? The coffee makers?

    And all the custom work, like bending pipes or cutting I-beams, or running conduit, are not likely to be able to be pre-constructed until the building process has ironed out all of the sequencing and bottlenecks after the experience of building a few.

    Bottom line, I think all of these massive ships are kind of a custom built machine.
    Having small runs of ships with evolutionary changes between classes is likely to lose only the slimmest margins of efficiency, if any at all.

    Lutefisk

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    1. The Fletcher class offers us the lesson on how to do this. Once a ship has begun construction, the design was set in stone and could not be changed. Changes, if any, were made to the next ship that was still in design phase.

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    2. And the navy had overlapped construction of the Fletcher and Sumner and then on the Sumner and Gearing.

      They started building Sumners while the Fletcher production run was still ongoing. They didn't try and change the Fletchers that they were building into Sumners.

      The navy then did the same thing with the Sumners and Gearings. They started the construction of Gearings while they were still completing construction of the Sumners.
      They, again, didn't attempt to make the Sumners that were under construction into Gearings.

      Lutefisk

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    3. It seems what caused us to turn to bigger class orders is a result of our long-ago "destroyer holiday"- roughly 30 years where we subsisted with modernized Sumners and Gearings, until we were faced with their retirements, so the Spruances had to have relatively significant numbers, although they never approached doing so 1 for 1, as that was beyond even the Cold War
      budget. Meanwhile, cruisers transitioned from guns to missiles, and then after going nuclear, they'd basically run their course, as destroyers had grown across the now-blurred lines of size and capability. If we would've decided to continue destroyer evolution with a new classes, in small batches, in the mid-50s (like we did with frigates) perhaps we wouldn't be in quite the pickle we are now.
      Great post CNO- It makes you really consider how things have changed and why!!

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    4. I counted 147 Sumner/Bearings that were decommissioned from 1968 through the 1970s, with a few lasting into the early 80s, so there were lots of ships going away, with only the Spruances trying to fill the gap they left behind. We should have been building new ships long before the 70s to prepare for this.

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  4. Also being able to order small batches here and there allowed you to change things up and test new designs and tech. Big Navys all or nothing policy has created a glaring holes in the US security and maritime capabilities.

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  5. We did build the Forrest Sherman DDs and Adams class DDGs, as well as several variants on the DLG types. We also built a couple of DLs earlier with experimental weapons and propulsion. That is not to mention the DE/FF types culminating in the Garcia/Knox classes.

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  6. Is the navy doing this with how they contract for the Virginia Subs? In batches under a multi-year contract, and then the next batch incorporates changes? Or, are they screwing around with each sub in progression?

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    1. That's a good question for which I have no answer. The Silent Service lives up to its name in that there is almost no public information on submarine design issues.

      Remember, though, that a multi-year buy contract does not preclude ship-to-ship design changes. It's simply a budget accounting procedure that supposedly reduces costs although there is little, if any, evidence that it does so and quite a bit of evidence to the contrary.

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