Abstract
System architects perform Modeling of Systems and their context to support communication with stakeholders, to facilitate reasoning about system requirements and design, to support decision-making, and in general to create and maintain understanding, insight, and overview. The challenge in modeling is to find an appropriate abstraction level, and to make sufficient progress.In this paper we discuss how time-boxing and iteration over multiple views and models help to address both challenges. Time-boxing and iteration fit in a broader modeling method that we will discuss briefly to provide the background.We will illustrate the approach with models made as part of the System Modeling and Analysis course at Buskerud University College. An especially interesting finding is that very short time-boxes of 5 to 15 minutes provide sufficient time to create usable first instances of models. Later iterations with somewhat longer time-boxes improve the quality of the initial models.
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