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As you already know from the lecture, function hierarchies are used to structure the functionality of the system interface considered in the RE-task.
1. Create a function hierarchy by extending or refining the individual system functionalities from the use case Reserve an E-Scooter with the app. Relate the elaborated collection of functions to each other using decomposition and dependency.
2. Specify input and output channels for your leaf-functions.
3. Identify additional relationships between the functions, e.g., "excludes/XOR", "interrupts", "as alternative to", "precedes", "enables/disables", "follows", "data (flow) dependency".
4. Provide an important reason for creating and using a function hierarchy. How is a function hierarchy different from the functions in the use case?

Sagot :

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