	US 7,458,068 B2
	Vertical requirements development system and method
Robert Scott Brown, Tucson, Ariz. (US)
Assigned to Raytheon Company, Waltham, Mass. (US)
Filed on Dec. 20, 2004, as Appl. No. 11/17,474.
Application 11/017474 is a continuation in part of application No. 10/679010, filed on Oct. 03, 2003, granted, now 7,305,655.
Claims priority of provisional application 60/464939, filed on Apr. 23, 2003.
Claims priority of provisional application 60/417462, filed on Oct. 09, 2002.
Prior Publication US 2005/0149917 A1, Jul. 07, 2005
Int. Cl. G06F 9/45 (2006.01)

U.S. Cl. 717—144

20 Claims

1. A vertical requirements development method for developing requirements for a system to be developed, the system to be developed having top-level requirements and being representable by a program specification tree made up of multiple layers of individual system elements, with each lower layer of the multiple layers comprising individual system elements having lower level requirements associated therewith compared to an upper layer, the method comprising the steps of:

based on the top-level requirements, identifying a plurality of system level requirements analyses which, upon satisfaction, comply with the top-level requirements; and

for each system level requirements analysis, creating a vertical flow down structure allocating specification requirements to each of the individual system elements that contribute to the satisfaction of that system level requirements analysis, regardless of the level of the individual system elements that contribute in the program specification tree.