@NRao ^^^ Old article but here are the relevant bits about MKIizing. It gets into quite a bit of detail:
"The avionic architecture of the F-35 solved this by introducing two separate integration levels. Customers can access the high level, introducing country-specific services, libraries or updates on their own, outside the aircraft software-upgrade cycles. The lower level is proprietary to the U.S. Joint Program Office and accessible only by Lockheed Martin. This level manages flight and mission-critical services, including flight controls, CNI and display, sensor management and self-protection. It also relates to the sensitive low-observable envelope of the F-35, an issue passionately guarded by the U.S.
Replacing core avionics with new systems at such a profound level of integration is unlikely, as it would require extensive testing by all F-35 operators with no obvious gain for the developer. The IAF is moving toward a different approach—the implementation of so-called integrated modular avionics (IMA). The concept has been in development under an Israeli Defense Research and Development Directorate program for several years and is currently being implemented under several pilot programs. "
http://aviationweek.com/awin/israel-us- ... 35-ew-work
Note the offsets in a FMS program. Israel gets to make the wings and to integrate its own HMDS
On related subject, Sweetman quotes Gen. Mike Hostage (where do they get these names from?):
"I’m going to have some F-35s doing air superiority, some doing those early phases of persistent attack, opening the holes, and again, the F-35 is not compelling unless it’s there in numbers,” the general says. “Because it can’t turn and run away, it’s got to have support from other F-35s.
So I’m going to need eight F-35s to go after a target that I might only need two (F-22) Raptors to go after. But the F-35s can be equally or more effective against that site than the Raptor can because of the synergistic effects of the platform.”
The words “that site” imply that Hostage is talking about destruction of enemy air defenses (DEAD) rather than air superiority alone – where the F-22’s speed and larger missile load could be expected to yield an advantage over the F-35.
But a four-to-one advantage for the F-22 in DEAD, which is one of the JSF’s prime design missions, is unfavourable in terms of cost-effectiveness: according to a 2008 RAND study of continuing production of the F-22 (at 30 or fewer per year) and the most optimistic F-35 numbers from Lockheed Martin (at 150-plus per year),
the F-22 at worst costs twice as much as the F-35."
http://aviationweek.com/blog/f-35-stealthier-f-22
This is the question ^^^ I was asking re the JSF-Rafale.
How many Rafales does it take on day one versus JSFs to do the same work?