| Information systems (IS) development and maintenance for the organizations today is a complex task. They typically require systems that are integrated, internally consistent, and consistent with their latest operational and other business practices. Highly complex requirements, bounded rationality problem for developers, and high personal turnover makes it imperative that IS development and maintenance is supported with an organizational perspective.; We present the Organizational Systems Development (OSD) model and the organization model based systems development method to intelligently support systems development and maintenance in a knowledge-based environment with an organizational perspective. Besides the domain knowledge and the systems development knowledge, we integrate the support for the organizational knowledge and the organizational model in the OSD environment to enable system development that is highly reuse based, considers other IS in the organization, and inherently supports integration.; The OSD model has two main processes--specification development process and system synthesizer process. The specification development process develops system-specifications from user requirements and propagates changes in specifications when modifications are required. The system-synthesizer process generates an executable system from the specifications.; We present the concepts of the organizational model as integration of all system specifications in the organization, and application views as a minimal subset of the organization model that specifies the application system completely. We use these concepts for the organization model based IS development and show the advantages like high reuse, high productivity, capture of design knowledge, specification based maintenance, consistent implementation of changes across IS, etc. We present various algorithms required to manage views and OM in the OM-based systems development. An object-oriented representation is adopted to maximize the benefits of the organization model.; For implementing the OSD model, we present an architecture that supports import and export of the knowledge that is not specific to the organization. We use an expert system shell to implement the key components and demonstrate the feasibility and advantages of OM based approach. |
