IRG - Interactive Route Generator: A Narrative Description,
Frank H. Cullen, John J. Jarvis, H. Donald Ratliff · Defense Technical Information Center (DTIC) · 1982
The IRG system can be described in two general environments; a physical environment, which is mainly concerned with what components are where; and the philosophical environment, which is principally concerned with methodological issues such as division of labor between the man and the machine and the underlying mathematical models. We will begin this section with a brief discussion of the philosophical environment with the intent of motivating the ensuing discussion of the system's physical components.