What is a Use Case?

To explain a Use Case plain and simple we chose the following scenario for you from daily life.

You want to drink a cup of coffee and no one to prepare it for you. So roll up your sleeves and go to work!  What do we need for a simple Use Case?

• Actor
  Who makes the coffee? (It's obviously you!)
• Constraints
  How do you want your coffee? (quality, quantity, time...)
• Business Objects
  What things do we need (coffee, water, cup, coffee percolator...)
• Main Flow
  How to brew a coffee? (fill percolator with water, insert coffee filter, fill in ground coffee...)
• Preconditions
  Is everything ready to start? (percolator has power supply...)
• Post Conditions
  What is the goal? (a cup of fresh brewed black coffee)

So what's it all about? To come from informal, natural language (inexact, ambiguous) to a formal, precise and unambiguous description.

Click here to download the presentation

A Simple Use Case