In questo sito i ritardi dell' F35 sono stati causati dal software. http://whythef35.blogspot.com/
The emphasized line is the key to much of the delay. "Requirements have grown". Those increased requirements then have to be implemented via coding of software. And that means size, complexity and integration issues. New requirements then have to be tested and integrated, defects identified and corrections made. It is then back to testing and integration. At some point, someone on the DoD side has to say, "no more" and refuse any new requirements being added. It appears that's now the case.
Certo e' che si poteva gestire meglio questo sviluppo del software facendo una programmazione meno confusa. Forse a quest'ora l'aeroplano era gia pronto.