Re: F-35 (was:F-22 ADA Programming)

["Frédéric Praca" <frederic.praca@free.fr>]

On Tue, 28 Oct 2014 20:49:56 -0500, Robert Love wrote:

> On 2014-10-27 04:53:56 +0000, Jerry Petrey said:
> 
>> On 10/26/2014 11:31 AM, nathandsash@gmail.com wrote:
>>> I read a few articles on ADA programming and came across a very
>>> interesting fact: that the F-22 was/is programmed in ADA. So this
>>> raises a few questions for me:
>>> 
>>> 1) What version of ADA is the F-22 programmed in?
>>> 2) What exactly were the parts of the F-22 were programmed in ADA?
>>> Were all the avionic components programmed in ADA or are there some
>>> programmed in another language like C, C++, VHDL, Verilog, etc.
>>> 
>>> 
>>> 
>> I was working for Lockheed during the time the F22 software was being
>> developed.  I worked on other aircraft using Ada (the C130J and the
>> C27J) and we all used Ada - it was Ada83 and we sometimes shared some
>> code with the F22 people.  Ada was very successful on all those
>> aircraft.  By the way, the Boeing 777 was also done mostly in Ada as
>> was the Rosetta spacecraft which has just recently achieved a comet
>> rendezvous after a 10 year journey.
>> 
>> Jerry
> 
> Does anyone have knowledge of how software for the F-35 went?   Budget,
> schedule and quality?    Was it autocoded from UML or written in the
> traditonal fashion?  Is there any way to compare software development
> success between F-22 and F-35?

Well, you can find several things about that.
First, on Wikipedia page (https://en.wikipedia.org/wiki/
Lockheed_Martin_F-35_Lightning_II#Program_cost_increases_and_delays ), 
you will learn that software is one of the main actors in the delays.

More technical information can be found there (https://www.csiac.org/
sites/default/files/
journal_files/2010_03_30_SoftwareQualityReliabilityandErrorPrediction.pdf 
) from page 36 to 39.
One thing linked to the other posts in this thread is the choice of C/C++ 
for staffing concerns.

But don't count on me to make the link between software delays and the 
C++ choice :)

Fred