hat
Devlopman orijinal te kòmanse anba "la Commando Teknoloji Avanse" (ATB) pwojè pandan administrasyon an Carter, ak pèfòmans li yo te youn nan rezon ki pou anile li nan Lancer a B-1. ATB kontinye pandan administrasyon an Reagan, men enkyetid sou reta nan entwodiksyon li yo te mennen nan reyenstale lisans la nan pwogram nan B-1 kòm byen. depans Pwogram leve nan tout devlopman. Ki fèt ak manifaktire pa Northrop Grumman ak asistans nan men Boeing, pri a nan chak avyon mwayenn US $ 737 milyon dola (nan 1997 dola). depans Total akizisyon mwayenn $ 929 milyon dola pou chak avyon, ki gen ladan pyès rezèv, ekipman, rénovation, ak sipò lojisyèl. Pri a pwogram manm ki gen ladan devlopman, jeni ak tès, mwayenn $ 2.1 milya dola pou chak avyon nan 1997.
eng
Development originally started under the "Advanced Technology Bomber" (ATB) project during the Carter administration, and its performance was one of the reasons for his cancellation of the B-1 Lancer. ATB continued during the Reagan administration, but worries about delays in its introduction led to the reinstatement of the B-1 program as well. Program costs rose throughout development. Designed and manufactured by Northrop Grumman with assistance from Boeing, the cost of each aircraft averaged US$737 million (in 1997 dollars). Total procurement costs averaged $929 million per aircraft, which includes spare parts, equipment, retrofitting, and software support. The total program cost including development, engineering and testing, averaged $2.1 billion per aircraft in 1997.