A Real-Time Systems Context for the Framework for Information Systems Architecture

In this paper we review the framework for information systems archkecture first introduced by Zachman' and show how it can be applied in the context of real-time systems. Discussions are included throughout the paper to convey some of the characteristics unique to real-time systems and to point out areas of special architectural concern. I n the past, when the depth and breadth of computer applications were dramatically limited by hardware technology, system architecture was simple and straightforward. Today, business information systems are driven increasingly by high-level business strategies, instead of smaller-scale functional processes. Rather than just mechanizing a manual procedure, company-wide systems are moving and managing information that is rapidly becoming the actual infrastructure of the business. Furthermore, new technologies and increasing information demands by managers have taken business systems from batch processing and time sharing to the domain of high-performance , real-time systems. An overall framework to better link systems to businesses and at the same time guide the development of these systems has been recognized by many. In other words, a strict discipline of construction or architecture-must be known and followed. In 1987 John Zachman proposed a framework for information systems architecture , within which all aspects of information systems architecture (ISA) are depicted, from high-level business strategies to system coding. The ISA logical construct serves to define the interfaces and integration of the various system components. In this paper we: Review and examine the Zachman framework within the context of real-time systems, which are increasingly characterizing today's business decision systems Interpret this ISA framework so as to apply it specifically to real-time systems architecture Wopyright 1995 by International Business Machines Corporation. Copying in printed form for private use is permitted without payment of royalty provided that (1) each reproduction is done without alteration and (2) the Journal reference and IBM copyright notice are included on the first page. The title and abstract, but no other portions, of this paper may be copied or distributed royalty free without further permission by computer-based and other information-service systems. Permission to republish any other portion of this paper must be obtained from the Editor.