1. © by cellconsult.com UC Brew Coffee The Use Case Idea

2. © by cellconsult.com UC Brew Coffee – UC Document

3. © by cellconsult.com UC Brew Coffee – Main flow 1 2 3 4 5 6 7 The CM fills water into the water tank The CM opens the filter box and inserts a new filter The CM fills in roast and ground coffee into the filter and closes the filter box The CM checks the correct position of the coffeepot The CM starts the coffee machine (percolator) The coffee machine (percolator) brews a fresh and drinkable coffee The UC ends There is no fresh (drinkable) coffee available A fresh and drinkable coffee is brewed

4. © by cellconsult.com UC Brew Coffee – Alternate flow 1 2 3 4 5 6 7 A3 A6a There is no fresh (drinkable) coffee available A fresh and drinkable coffee is brewed The CM fills water into the water tank The CM opens the filter box and inserts a new filter The CM fills in roast and ground coffee into the filter and closes the filter box ? The CM checks the correct position of the coffeepot The CM starts the coffee machine (percolator) The coffee machine (percolator) brews a fresh and drinkable coffee The UC ends The roast and ground coffee has been filled in already into the new filter. The CM closes the filter box A power breakdown occurs The CM waits until reactivation

5. © by cellconsult.com UC Brew Coffee – Exceptional flow 1 2 3 4 5 A5a1 A5a There is no fresh (drinkable) coffee available The CM fills water into the water tank The CM opens the filter box and inserts a new filter The CM fills in roast and ground coffee into the filter and closes the filter box The CM checks the correct position of the coffeepot The CM starts the coffee machine (percolator) The coffee machine (percolator) does not respond The CM reads the manual and tries to solve the problem The CM cannot solve the problem The CM stops the procedure and contacts the support

6. © by cellconsult.com There is no fresh (drinkable) coffee available UC Brew Coffee at a Glance 1 2 3 4 5 6 7 A5a1 A1 A2aA2b A3 A5a A6a A4 A6a1 A fresh and drinkable coffee is brewed

7. © by cellconsult.com Actor What is a Use Case? What is the goal? What things do we need? How to brew a coffee? Who makes the coffee? Is everything ready to start? Business Objects: Coffee, Water, Cup … Coffee Percolator How do you want your coffee? Main Flow Fill percolator with water Insert coffee filter Fill in ground coffee etc. Preconditions Percolator has power supply Constraints Quality, Quantity, Time… Post conditions A cup of fresh brewed black coffee I want coffee! ? Thank you!

8. © by cellconsult.com Why Use Cases? FORMAL Verbal Use Case Actor Business Objects Preconditions Main Flow Step 1 Step 2… Post Conditions Constraints

9. © by cellconsult.com How to test a Use Case? Use Case Actor Business Objects Preconditions Main Flow Step 1 Step 2… Post Conditions Constraints Test Case Actor Business Objects Preconditions Main Flow Step 1 Step 2… Post Conditions Constraints Test Data