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The NASA space probes can’t plow into a minivan with a mom and her 2 kids inside. There’s an entire different risk level here.
by vips7L 1y ago
The NASA space probes can’t plow into a minivan with a mom and her 2 kids inside. There’s an entire different risk level here.
- WalterBright 1y agoWhat if the update is to address a safety issue?
- hulitu 1y ago> What if the update is to address a safety issue? If they didn't make "safety" right from the first time, why do you think they will do it better the second time, when the fixes are more expensive and the time pressure is enormous ?
- WalterBright 1y agoPlease refer to my earlier comment that there is zero chance of making bug-free software.
- throwway120385 1y agoCounterpoint: You can get close enough that you can run a probe in space for 60 years.
- jacquesm 1y agoTrue, but: different budget per unit of code produced.
- seanhunter 1y agoHence the famous joke at NASA that you get to launch the rocket when the documentation if piled up would be taller than the rocket itself. ...all of which is just an excuse to show this great picture of Margaret Hamilton [1] lead developer on the Apollo guidance system standing next to (and slightly shorter than) the printouts of the source code https://en.wikipedia.org/wiki/File:Margaret_Hamilton_-_restoration.jpg https://en.wikipedia.org/wiki/File:Margaret_Hamilton_-_resto... [1] Who was admittedly quite short apparently
- jacquesm 1y agoThat's a fantastic picture. I've worked on some interesting software with lives on the line as well and the amount of test code absolutely dwarfed the functional part. I wonder whether at the time of the effort you linked that was already common practice and if it was what the fraction of that code was tests. Assuming she's 1.65 meters tall and 66 lines per page (quite common back then), at 0.2 mm thickness per page that's 8K pages times 66 lines / page is ~550K lines. Pretty impressive!
- WalterBright 1y agoSome probes have had major failures that JPL was able to work around with a software update.
- throwway120385 1y agoThe manufacturer needs to issue a recall in that case. They can't have their cake and then eat it too. Either the update is not critical and should not be generally available or it is critical and they should inform their users with the proper framing.
- WalterBright 1y agoThe original software will always have bugs in it, and those bugs will need correction. Software updates to fix/enhance it will also introduce new bugs. The idea that one can create complex bug-free software is a fantasy. The correct mindset is to learn how to deal with failure. (This is how airliners are designed.)