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Composing Features by Managing Inconsistent Requirements

In this paper, Robin Laney, Thein T. Tun, Michael Jackson, and Bashar Nuseibeh provide insight for system development based off of requirements that are not completely consistant. The paper follows an introduction and sample to the Problem Frames approach, then goes on to show how to express requirements and domain properties in the Event Calculus, requirements, specifications, solutions, and eventually future work. Using a deceptively simple example (a motorized awning window), the writing team illustrates how even the most banal requirement can have a profound effect on all other elements of the project. It’s through this example that the reader finds the inherent truth: any requirements, inconsistent or otherwise, can mean a huge difference in effort and risk – and composing overall features with those inconsistent requirements demands a set of regimented processes in order to achieve success.

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