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Use Cases: Patterns and Blueprints by Karin Palmkvist, Gunnar Övergaard

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Chapter 33. Passive External Medium

Problem

The system is to monitor or control an external medium that in itself is passive (for example, the surrounding air or a fluid).

Characteristics: Common in some domains. Advanced blueprint.

Keywords: Measuring, sensor, unbound external medium.

Blueprints

Passive External Medium

Model

Model

Description

This blueprint consists of one actor and one use case. The use case receives a value from a medium external to the system, but the medium itself is passive; that is, it does not actively send any information to the system. That is why the device measuring the value from the medium rather than the medium itself is modeled ...

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