Strategy Page has the details:
It’s been eleven months now since the U.S. Army cancelled its 15 year effort to develop the JTRS (Joint Tactical Radio System). This program cost over $6 billion and has been a major embarrassment for the U.S. Department of Defense. Actually, JTRS still exists, on paper, but its goal, to provide better combat radios, has been accomplished by adopting civilian radios that do what the troops needed done and calling it JTRS. In the time the army spent working on JTRS some $11 billion was spent on buying more radios using existing designs, and a lot of off-the-shelf equipment incorporating stuff JTRS was supposed to do.
JTRS was yet another example of a military development project that got distracted, and bloated, trying to please everyone. There was, in a word, no focus. There’s been a lot of this in the last decade. That’s what killed the Comanche light attack helicopter, the Crusader self-propelled howitzer, FCS (Future Combat System), the Seawolf SSN, the DDG-1000 destroyer, B-2 bomber, F-22 fighters and several military space satellite projects. In all cases some of the technology developed was put to use in cheaper systems and sometimes a few of the cancelled systems were built (three Seawolfs, three DDG-1000s, 21 B-2s and 187 F-22s). These cancellations and cutbacks saved over half a trillion dollars. That goes a long way towards paying for projects that were not cancelled and are nearly half a trillion dollars over budget. But overall these failures were expensive and embarrassing.
JTRS, however, was the poster child of what usually goes wrong and how it impacts the combat troops. After all, radios are something personnel in all services use a lot. The main problem with JTRS was that the troops needed digital (for computer stuff) and analog (traditional radio) communications in one box and it had to be programmable, in order to handle new applications and the need to communicate with other radio types. That’s what JTRS was supposed to do but it never happened. The procurement bureaucracy and government contractors consumed over six billion dollars but never quite got anything useful out the door.