Data flow: the general problem and a cognitive model /

The purpose of this study was to determine the state-of-the-art in data flow and to formulate a data flow model. ... The mechanics of the model include a verbal representation method, a graphic representation method, and a calculus. The verbal and graphic aspects of the model facilitate the communication and conceptualization of functional relationships within a system and the functional similarity or dissimilarity between both systems and parts of the systems. The model calculus, based on formal logic, facilitates the analysis and perception of the functional strategies of the system."Project no. 1710, Task no. 1710004.""Prepared under contract no. AF 33(616)--7477 ... American Institute for Research, Pittsburgh, Pennsylvania.""This report is catalogued by the American Institute for Research as AIR-C39-1/62-TR." -- Foreword."May 1962."[ASTIA document] AD0283252 from (http://www.dtic.mil/). Stamped on the cover.Cover title.Includes bibliographical references (pages 69-70).The purpose of this study was to determine the state-of-the-art in data flow and to formulate a data flow model. ... The mechanics of the model include a verbal representation method, a graphic representation method, and a calculus. The verbal and graphic aspects of the model facilitate the communication and conceptualization of functional relationships within a system and the functional similarity or dissimilarity between both systems and parts of the systems. The model calculus, based on formal logic, facilitates the analysis and perception of the functional strategies of the system.Mode of access: Internet