A System Engineering Approach for the Migration of Computer‐based Systems

Abstract

In this paper major factors contributing to system migration failures are reviewed. We highlight the need for a comprehensive system engineering approach that can address the inherent complexities of migrating mission critical systems. To address this need, a model-based approach supported by tools is presented. Central to this approach is the use of a new type of system architecture model called "Loop Relationship (LR) Models." These models are used to recover the legacy system design, specify the migrated system requirements and proposed system design; and analyze the performance implications of proposed modifications to the legacy system. Finally we will discuss our experience in forming a team to apply the above approach on a number of system migration projects.