These are flashcards an notes made by students on topics like 'value', 'app' and 'diagrams', originating from:

- Michael Jesse Chonoles
ISBN-10 0128096403 ISBN-13 9780128096406
1335 Flashcards & Notes
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Study Cards on value, app, diagrams

Which diagrams are the simpelest but also the most useful?
Use Case Diagrams
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Which diagram are we talking about?

"help you decide what these tasks are and how they should be grouped and the scope of the work  "
Use Case diagrams
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What does a Use Case represent?
represents a purpose or goal that some user wants the system to help achieve.
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What would be a use case in a hail riding app?
The potential passenger uses the app to hire a car at a specified location.

Thepotential passenger may also have other goals, such as :
  • obtaining the estimated cost
  • time to pick up,
  • time to arrive,
  • Establish a Payment Method,
  • among other things
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What would be a possible goal from the perspective of the driver?
The driver may also have goals, such as :

  • to identify potential riders
  • starting location
  • and time, and ending location.
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Which diagrams are the organizational element that captures the decomposition into work  tasks and team assignments?
Package Diagrams?
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How do we call users in Use Case diagrams?
Actors
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What would be actors in a Library System?
In the Library system, the Actors would include :

  • Patrons
  • Browsers
  • Librarians
  • Circulation Desk Staff
  • Shelving Staff
  • Catalogers
  • and people involved in Accessioning and Deaccessioning material
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"Each Use Case must return some value to the Actor.


What does this means?


Returning value indicates that some desirable outcome occurs.

This is very different from a return value from a function call or subprogram.

Use Cases tend to be on a much higher level that these software returns and may not be so simple.
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What would be the value in a Ride-hailin app?
In the ride-hailing app example, canceling a ride might be a goal that the Actor has.

The value would be that the ride was successfully canceled to the benefit of the Actor
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There are Use Cases that are triggered by the system itself.

Give a example of a trigger.
Timers or by sensors
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