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USA-Japan design automation symposium '75
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USA-Japan Design automation symposium '75 21st -- 22nd August 1975, Tokyo, Japan. Sponsored by the Information Processing Society o f Japan in participation witb IEEE Computer Society. The symposium was opened by the chairman, T. Motooka, University of Tokyo. He emphasized the trend of wider applications of design automation technology, mentioning software design automation. Seventy-seven delegates registered including a disappointing overseas attendence. Presentations were made in English and Japanese with simultaneous interpretat,on. This symposium covered two roam areas, computer design automation and aircraft design automation. US d.a. is characterized by large-scale systems using very powerful host machines with many interactive terminals. Japanese papers were mostly reports on practical implementations using improved algorithms and/or methodologies, and so many detailed questions were raised. There were four sessions, namely, design automation systems, automauc testing, aircraft design automation, and placement and routeing. In the first session, A. S. Kawaguchi, Boeing Computer Services, US, presented the methodology of systematic development of large scale software systems. The emphasis was placed on the design stage distinct from the coding stage, tie reported that the design expressions design tree and control graph, common to both users and system designers, can minimtze the communication gap between them, and the method can considerably reduce financial risks~ as estimation within 10% of actual cost is possible even for complex software projects of more than 250 K program statements. The distributed computing system in Rockwell International described by F. A. Hess, IBM, is a typical large-scale system in the US. It uses several 168 s and 700 terminals and covers many kinds of design applications. In contrast to these large systems, T. Mizogu-
chi, Mitsubishi Electric, Japan, reported the development of a 1.s.i.d.a. system with automatic wiring capability using a minicomputer with 24 K memory, using a well-thought out method for file-structure and file access. The effect of using a functional block language - a popular approach to ESS design in Japan was also presented. In the second session on automatic testing, methodologies of test generation of digital and analogue circuits and automatic wiring checks were presented. The system described by HIS uses D algorithm but J. M. Galey, IBM, US, chairing this session, mentioned IBM uses not Roth's D algorithm but a heuristic method for test generation. In the third session on aircraft design automation, R. E. Miller. Boeing Commercial Airplane, US, surveyed the aircraft d.a. first and emphasized that engineers should control computers, not vice versa. In reply to the question on databases in d.a. he believes that relational databases, still in the research and development stage, will be suitable rather than today's hierachical database. Three typical aircraft d.a. systems in the US were presented; the Pratt and Whitney aircraft interactive turbine c.a.d.-c.a.m, system, by E. N. Nelson, United Technologies Inc; the ATLAS design automauon system, by R. E Miller, Boeing Commercial Airplane Co; the CADAM system of Lockheed-Georgia given by S. H. Chasen. These are all very large systems using large computers and many interactive terminals: United Technologies' with 168 and 80 terminals, ATLAS with 6600 s, and CADAM with 360/65 and graphic terminals. Many examples of design cost saving, improvements in design productivity, reduction in elapsed time etc. were reported. E. N. Nilson also showed a movie on c.a.d.c.a.m, at United Technologies, and displayed 3-D pictures were very impresswe. The generation of 3-D drawings with hidden-line discrimination was also
presentea by J. S. L. Wong, Hong-Kong Polytechnic. The importance of interactive systems was emphasized and a discussion on the number of terminals followed. R.E. Miller said that one terminal per three engineers is a suitable ratio. J. M. Galey said that the ratio at IBM, San Jose, is also 1 : 3. An aircraft design synthesis program, PASPA, described by T. Obata, Japan Defence Academy, seems in a research and development stage m contrast to practical US systems with high productivity. The last session on placement and routeing, were all Japanese papers. Three routeing systems were presented, COMPAS for multichip 1.s.i's, OSACA for i.e. cards, and BPLIANT for backplanes. COMPAS by Y. Sugiyama, Musaschino ECL, Nippon Tel. Tel., uses a two stage approach; channel assignment and grid assignment. A 9 5 - 9 9 % wiring rate is reported. OSACA by A. Sakamoto, Osaka University, uses a combination of space and channel assignment, line searching and maze running. It has achieved 100% wiring rate In 20 s. BPLIANT by T. Shiozaki, Nippon Electric, mainly uses the table wiring method and maze running as a supplement and was applied to develop ACOS 77. Table wiring is a simple heuristic approach that enables high speed processing with small storage requirements. A placement program for p.c.b's using extended Steinberg's method, a d.a. system using physical oriented mput data, and automatic preparation of engineering change data with checking capabilities were also presented. The symposium was closed by J. M. Galey andT. Kurachi of Tokyo Shibaura Electric. The attempts to build two types of bridges~ one between US d.a. and Japanese d.a. and the other between computer d.a. and aircraft d.a. were both successful. A further symposium is to be held. The proceedings are available from Information Processing Society of Japan, The Kikai Shinko-Kai Building, No. 3-5-8 Shiba-Koen. Minato-Ku, Tokyo, Japan. .4. Yamada, Nippon Electric Co., Ltd.. Tokyo, Japan
COMPUTER AIDED DESIGN
USA-Japan Design automation symposium '75 21st -- 22nd August 1975, Tokyo, Japan. Sponsored by the Information Processing Society o f Japan in participation witb IEEE Computer Society. The symposium was opened by the chairman, T. Motooka, University of Tokyo. He emphasized the trend of wider applications of design automation technology, mentioning software design automation. Seventy-seven delegates registered including a disappointing overseas attendence. Presentations were made in English and Japanese with simultaneous interpretat,on. This symposium covered two roam areas, computer design automation and aircraft design automation. US d.a. is characterized by large-scale systems using very powerful host machines with many interactive terminals. Japanese papers were mostly reports on practical implementations using improved algorithms and/or methodologies, and so many detailed questions were raised. There were four sessions, namely, design automation systems, automauc testing, aircraft design automation, and placement and routeing. In the first session, A. S. Kawaguchi, Boeing Computer Services, US, presented the methodology of systematic development of large scale software systems. The emphasis was placed on the design stage distinct from the coding stage, tie reported that the design expressions design tree and control graph, common to both users and system designers, can minimtze the communication gap between them, and the method can considerably reduce financial risks~ as estimation within 10% of actual cost is possible even for complex software projects of more than 250 K program statements. The distributed computing system in Rockwell International described by F. A. Hess, IBM, is a typical large-scale system in the US. It uses several 168 s and 700 terminals and covers many kinds of design applications. In contrast to these large systems, T. Mizogu-
chi, Mitsubishi Electric, Japan, reported the development of a 1.s.i.d.a. system with automatic wiring capability using a minicomputer with 24 K memory, using a well-thought out method for file-structure and file access. The effect of using a functional block language - a popular approach to ESS design in Japan was also presented. In the second session on automatic testing, methodologies of test generation of digital and analogue circuits and automatic wiring checks were presented. The system described by HIS uses D algorithm but J. M. Galey, IBM, US, chairing this session, mentioned IBM uses not Roth's D algorithm but a heuristic method for test generation. In the third session on aircraft design automation, R. E. Miller. Boeing Commercial Airplane, US, surveyed the aircraft d.a. first and emphasized that engineers should control computers, not vice versa. In reply to the question on databases in d.a. he believes that relational databases, still in the research and development stage, will be suitable rather than today's hierachical database. Three typical aircraft d.a. systems in the US were presented; the Pratt and Whitney aircraft interactive turbine c.a.d.-c.a.m, system, by E. N. Nelson, United Technologies Inc; the ATLAS design automauon system, by R. E Miller, Boeing Commercial Airplane Co; the CADAM system of Lockheed-Georgia given by S. H. Chasen. These are all very large systems using large computers and many interactive terminals: United Technologies' with 168 and 80 terminals, ATLAS with 6600 s, and CADAM with 360/65 and graphic terminals. Many examples of design cost saving, improvements in design productivity, reduction in elapsed time etc. were reported. E. N. Nilson also showed a movie on c.a.d.c.a.m, at United Technologies, and displayed 3-D pictures were very impresswe. The generation of 3-D drawings with hidden-line discrimination was also
presentea by J. S. L. Wong, Hong-Kong Polytechnic. The importance of interactive systems was emphasized and a discussion on the number of terminals followed. R.E. Miller said that one terminal per three engineers is a suitable ratio. J. M. Galey said that the ratio at IBM, San Jose, is also 1 : 3. An aircraft design synthesis program, PASPA, described by T. Obata, Japan Defence Academy, seems in a research and development stage m contrast to practical US systems with high productivity. The last session on placement and routeing, were all Japanese papers. Three routeing systems were presented, COMPAS for multichip 1.s.i's, OSACA for i.e. cards, and BPLIANT for backplanes. COMPAS by Y. Sugiyama, Musaschino ECL, Nippon Tel. Tel., uses a two stage approach; channel assignment and grid assignment. A 9 5 - 9 9 % wiring rate is reported. OSACA by A. Sakamoto, Osaka University, uses a combination of space and channel assignment, line searching and maze running. It has achieved 100% wiring rate In 20 s. BPLIANT by T. Shiozaki, Nippon Electric, mainly uses the table wiring method and maze running as a supplement and was applied to develop ACOS 77. Table wiring is a simple heuristic approach that enables high speed processing with small storage requirements. A placement program for p.c.b's using extended Steinberg's method, a d.a. system using physical oriented mput data, and automatic preparation of engineering change data with checking capabilities were also presented. The symposium was closed by J. M. Galey andT. Kurachi of Tokyo Shibaura Electric. The attempts to build two types of bridges~ one between US d.a. and Japanese d.a. and the other between computer d.a. and aircraft d.a. were both successful. A further symposium is to be held. The proceedings are available from Information Processing Society of Japan, The Kikai Shinko-Kai Building, No. 3-5-8 Shiba-Koen. Minato-Ku, Tokyo, Japan. .4. Yamada, Nippon Electric Co., Ltd.. Tokyo, Japan
COMPUTER AIDED DESIGN