Responsibility Driven Design. Overview. Use Cases Responsibility-driven design CRC Cards. Use Cases. Use Case : a collection of related success and failure scenarios that describe an actor using a system to support a goal Note: use cases are text stories
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Responsibility: Carry a rider mountRider goToDestination dismountRiderResponsibility: Process food processFood
Responsibilities organize what an object does or reveals
Represents an individual within the scheduling system
Meeting (a type of Appointment)
(e.g. Window, database, etc.)
(within the bounds of the current iteration…)
(more on this momentarily)
When to define new data types?
If it is composed of separate sections (e.g. phone number, name of person)
There are operations associated with it (e.g. social security number)
It has other attributes (e.g. promotional price)
It is a quantity with a unit (e.g. currency)Data Types
Be careful to avoid ‘analysis paralysis’