It has been critically evaluated by many IS researcher that the traditional IS design methodology represented by 'waterfall model' does not necessarily fit to the unstable business environment, because these treats the IS as a self-contained existence, and depends on dualism, such as 'environment-and-organization' or 'environment-and-action'. Therefore, there are quite a few views that IS design methodology must be reexamined under the logic of subject-and-object unification, the interrelationship with environment, the viewpoint of socio-technology, and so on. One of the countermeasures is to reconsider the IS function and then to re-develop the design methodology from the viewpoint of a situated action theory. In this paper, firstly, the significance of IS design informed by a situated action theory is clarified by the survey of related precedence research. Subsequently, by reinterpreting the existing case study from a situated perspective, the validity of situated design methodology is verified, and the clue for building situated design methodology is discovered.

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Since current Information Systems (IS) become more complicated and ICT is used in most of businesses, "Systems Failure" causes a serious damage for our daily life once it occures. Based on this background, highly-dependable systems are focused on in many fields in artificial physical systems and even human activity systems. In this paper, we discuss on the role of formal methods in Information Systems Development and it will be discussed whether formal methods can solve those problems.

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Because activities and business processes have been changing successively so as to realize sustainable growth through activation of organizational kaizen activities, information system should be redesigned continuously. Therefore information system design should be recognized as unique organizational implementation process of forming active socio- technical network to realize effective organizational activities. An information system design guideline is presented in relation with organization design and information design for real organizational activities based on above mentioned perceptions. And then TQM activities model is provided as the reference framework of real organizational activities model for information system design.

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Information system design methods have evolved with changes in the environment of system development. In this paper, we evaluated each of the information system design methods; structured methods for functional oriented approach, ER model which focuses on the data oriented approach, object oriented design for WEB applications with reference to the environment of system development. This paper also indicates emerging importance of enterprise system architecture which endows more feasibility in the whole enterprise system, as traditional application designs looks to have limited the ability for enterprise-mission-critical information systems.

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Recently, along with continuous changes and improvements of business processes, many industrial software systems are faced with various kinds of changes. Especially, a change in the system design may have serious impacts on the whole software products. In this paper, we focus on a kind of structural change in the system design which requires a large amount of code modification. In a real-world object-oriented program, many code fragments to access a certain object/objects tend to be scattered in the whole program. If the structure of the system is drastically changed, then such widely scattered code fragments should be consistently modified and generally such a modification becomes excessively hard. To address the problem, we propose a language mechanism which protects the access codes from the structural change of the system. Based on the language mechanism, we have also designed a programming language FrameJ and implemented a FrameJ-to-Java compiler Furthermore, we have reimplemented an existing Java application on FrameJ for a case study. Hereby, we can expect that our language mechanism is feasible and will improve the adaptability and maintainability of large scale programs.

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To align a business information system with its business, it is mandatory for a design data structure to represent the architecture of business and the design software around data. Computer programs should be structured along with the data structure. When the layer structure of the business archtecture is reflected to the business information system, we will be able to integrate it along with the business innovation program.

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When designing an information system generally, the strategic approach based on objective analysis and logical thinking is thought of as important. However, we discovered in our evaluation of practice of PBL which was performed in five companies that the realizable computerization is not related closely to the logical thinking nor strategic approach but to the specialized work style, original culture and the scenario for the future planned by a president. This paper reports the practice process of PBL and considers the introductory model of the information system based on the observed contents.

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Symbiotic computing is considered as a platform of post ubiquitous society. A system based the computing environment is called "symbiotic system", and it is necessary to discuss with what is that image and which design methodology fit well. In this paper, I discussed the systems design methodology which fit in symbiotic system. First, I reviewed classification and stage of information systems, and confirmed that "symbiotic" "emergent" "social role" were key words about modern information systems and that development. Then, I examined critical factors of the systems design at symbiotic system. And it was found from the result that interactive and context between designers and users, systems and human. Lastly, I suggested that contextual design a method of systems design fit in well with symbiotic system.

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To ensure that enterprise information systems are effective, the information systems division of an enterprise must clearly specify its requirements for the entire system, not just the software to be constructed. The information systems cycle is the continuous course of action by which enterprise information systems are constructed. It is important that the owner of the information systems specify his proto-requirements, defined as the requirements of the information systems, at an early stage of the cycle. This paper discusses how pattern language, a concept from architectonics, can be used to stipulate proto-requirements. In software engineering, applications based on pattern language have produced significant results in many books, including the Design Patterns. However these applications only focused on the aspect of the pattern format of pattern language. Originally, the concept of pattern language means continuous activities for building, which are called the timeless way. In information systems engineering, when focusing on this aspect, pattern language could be regarded as a mechanism to incorporate the requirements and design constraints of information systems into itself as organizational learning.

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These three methods are well-known Information system designing methods, Waterfall model, Prototyping, Iteration method. But all these methods have the same problem that gaps between business requests and developed systems cause many system troubles. To overcome these gaps there appeared a new approach from business sides. That is a combination of BPM (Business Process Management) and SOA (Service Oriented Architecture). In this report, I describe this new design method from a business side view, and consider its merit and demerit.

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This paper deals with the analysis of optimal design of management information systems for the electronic commerce among firms consisting of important factors in the backyard such as EDI, especially from the viewpoint of Actor Theory. We emphasize modeling of traceability using the IC tags which play important roles in the EDI among firms, and simultaneously try to deduce a kind of cause-effect model(Actor model) based on our own analytical result of questionnaires. As is known in the Actor Network Theory, all elements such as human, products, and so on in the system are regarded as important factors under the constitutional framework, and this kind approach is useful to analyze the success/failure process in the information system design. We find that there exist two kinds of attitudes against the traceability, namely, passive and active attitudes, and these difference surely affect the second-hand use(reuse) of IC tags, and the configuration of backyard systems.

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It has been assumed that it is difficult to predict or analyze the performance of the business process by introducing enhanced information systems. Business processes in actuality are too complex and dynamic to understand and analyze the performance with the conventional modeling techniques. In this context, through a case study of applying business process simulation (BPS), an approach is illustrated for predicting the performance of the business process. In addition, it is stressed that the information system should be incorporated into the business process, and BPS model can be suitable to depict BP/IS integration.

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