A correction about DEWS System, it's considered as Early 2000s Technology, and I don't think it's accurate information. Because the first time that DEWS system has been announced is in 2009 as EW Suit for the F-15SE ( Silent Eagle), but the program has been cancelled, but the first contract for the system was in 2012 for the benefit of the F-15SA, and then there was a series of flight test. I'm not sure but I think the flight tests of the fighter finished in 2015/2016.
To further information just search for " BAE Systems to Upgrade EW Capabilities On Saudi Fighter Jets "
Another point I just hope if you can check it, the EPAWSS has Offensive Jamming Capability, but DEWS is just Defensive system, according to the DB.
The bottom line is Boeing has used the United States Air Force document which calls " Eagle Passive/Active Warning Survivability System(EPAWSS) " they used it in drawing up their requirements for DEWS.
And I quote
" DEWS also meets or exceeds the requirements identified by the U.S. Air Force for a future EW system for its F-15s, says Ron Martinez, Boeing’s chief scientist for airborne electronic attack and EW development on the F-15 and F/A-18. Boeing used the Air Force’s capability
development document for the Eagle Passive and Active Warning and Survivability System in drawing up its requirements for DEWS "
Unfortunately, I can't add links.