Collision risk model; Reich-based collision risk models assume that after a collision, both aircraft keep on flying. This one does not. Mainly of theoretical use only.
Further Reading
G.J. Bakker, H.A.P. Blom, Air traffic collision risk modelling, 32nd IEEE Conference on Decision and Control, Vol 2, Institute of Electrical and Electronics Engineers, New York, Dec 1993, pp. 1464-1469. No Link