The manufacturing team, Sikorsky and Boeing, have attributed factors that were outside of their control, such as budget cuts, "requirement creep", and a protracted development period, to have caused problems with the program, rather than dysfunctionality on their part. Under the Comanche program, each company was responsible for the construction of different elements of the rotorcraft. Since the termination, both companies have decided to team up again to produce a jointly-developed prototype, designated as the SB-1 Defiant, for the Army's Future Vertical Lift (FVL) programme.