The F-35 is programmed in C++, while the other aircraft are programmed in Ada, which is one of the reasons that there is so much more code. When you have to code, test, and maintain 8 million lines of C++ in an environment where a single bug can be deadly, you should expect delays.

The choice of using C++ to write a system that is designed to never crash and the obvious ignorance of the "mythical man month" does not give a good impression of Lockheed's management.

The book can argue more convincingly and thoroughly than I can, but briefly: When new engineers join a project, they have to spend a lot of time familiarizing themselves with it, so they're not productive for a while. They take time away from the project's original engineers by asking a lot of questions, which actually means progress slows down.

Further, more people means more complexity to manage. There will be more miscommunication, more instances of engineers' work conflicting with other engineers' work, more differences in coding style, etc.. With more than 200 people on a project, I can only imagine the nightmares.

I'm not familiar with the F-35 codebase. But I have a hard time imagining it could benefit from 200+ people working on it simultaneously.

I'm also skeptical about this idea of 24/7 shiftwork. Will each person will have their own little piece of the codebase that nobody else touches? If so, then why have a nightshift? Why not just have everyone work in the day, since it's all in parallel anyway? If not, how in the world can you have engineer A coding a given module on the dayshift, who then hands it off to engineer B on the nightshift? Software is not like laying bricks. You can't just come on the next shift and pick up where the last person left off. You lose all the context they had in their heads while coding, which is absolutely essential.

Purchasing more licenses is always an option, but usually not a quick one.

Office space and third party software licenses mandating a 24 hour work cycle for the most expensive defense project of all time?! Maybe it should not be surprising. Their peers seem to just appropriate rights and constitutional interpretation to meet their needs, can't these guys just appropriate more matlab or whatever compiler it is licenses? Just seems like it is being treated like a manufacturing problem.

This same class of folks who are making these decisions are all contracting for NSA and have access to your data to keep us all safe...

Because that way you can fit more people in the same facility? Otherwise, it will be unused for 8 hours each day (being optimistic).

There's a very good reason not to have engineers work nights. While some are undoubtedly night owls, many (most?) will have lives and families which will suffer from night shifts. That accelerates burnout and increases resentment--both of which are usually running high in a troubled project anyway.

In other words, the fact that it is written in C++ tells you little more than the fact that it is written in C++ and not Ada, but that alone will tell you that they probably expanded their pool of potential programmers by a large margin.

Is that true? I'd think that the main requirements would be experience, intelligence, security clearance, probably familiarity with avionics.

Any good programmer worth working on such a project should be able to switch languages.

I'd hope it's not like some corporate web site that just needs the programming equivalent of warm bodies.

I could switch to COBOL in probably a couple weeks, but you'd have to pay me multiples of my current salary to do so for any length of time.

Oh, they crash. Software on currently fielded jets crash all the time, pilots call them "software anomalies."

Systems are designed to fail softly and reboot quickly (~1 minute) and sometimes do so automatically without physically crashing the jet. Sometimes the pilot won't even notice.

I hope by "sometimes" you mean "almost every time!"

If that's the case, why not use something like Erlang?

I'm pretty sure no self-respecting engineer would ever attempt to design such a thing (although many might be deluded into thinking that e.g. advanced type systems might help achieve that goal).

> choice of using C++

Almost certainly not a good indicator.. much of those LOC are likely integrations from other projects. Who is to say the alternative didn't involve rewriting some more sensitive, costly-to-produce code in Ada?

(http://www5.in.tum.de/~huckle/bugse.html)

When they get past this (and they will, they have the DoD over a barrel, they just have to not gloat too publicly) the fallout to the F-35 will last as long as F-35s are in operation. In the early 90s, Martin people hand-assembled Titan rocket guidance and control software because some time in the distant past, the assembler had some bugs. The F-35 software group will live with whatever horrific "best practices" the current group of reassigned workers come up with.

What the fuck?

I believe this was for "Commerical Titan", a short-lived, Titan 34D variant. Four flights, one of which left Intelsat VI in the wrong orbit. That wasn't software, but plugging the wrong cable in.

- Frederick P. Brooks, Jr. "The Mythical Man-Month".

Except that if we custom-order a car, the manufacturer isn't legally prohibited from selling it to someone else if we end up refusing to buy it.

For the sake of whatever competent programmers were already working on the system, I hope this is mostly PR noise.

It's way over budget, not as stealthy as originally claimed and completely unnecessary. The DOD should be putting this money and effort into UAVs.

I also have to wonder how quickly the Chinese will get the software updates.