Use case diagram: use cases and associations
Name:
Date:
Class:
A
Quick Questions
Shade in the A or B circle for each question.
1. How is a use case drawn in a use case diagram?
2. Which is the better name for a use case in a library system?
3. What does a use case represent?
4. What joins an actor to a use case?
5. Which use case name follows the naming convention?
B
Match the Pairs
Draw a line connecting each item on the left to its match on the right.
| Left column | Right column | |
|---|---|---|
| 1(Borrow Book) oval | ACustomer ——— (Place Order) | |
| 2Student ——— (Check Timetable) | BThe use case is named with a noun only. It should use a verb phrase that states a goal, such as Reset Password. | |
| 3A use case should be named with a verb first, so it describes an action the actor wants to do | CA use case: a goal the actor achieves with the system, drawn as an oval and named with a verb phrase | |
| 4Each use case oval is connected to the actor who achieves that goal by an association line | DAn association line joining the Student actor to the Check Timetable use case | |
| 5(Password) | E(Reset Password) | |
| 6Teacher (Enter Marks) | FThere is no association line between the actor and the use case. A line must join Teacher to Enter Marks. |
C
Definitions
use case
D
Fill in the Blanks
Complete each line of code by filling in the missing parts.
1.
Actor shape: stick figure
Use case shape: ____
2.
Member ___ (Borrow Book)
3.
Use case name = ____ + noun
Example: Borrow Book
4.
Actor: Member
Use case: Borrow Book
___________: Member --- Borrow Book
5.
A use case is a ____ an actor achieves
Example: Return Book
E
Spot the Error
Shade in the letter of the line that contains an error.
Question 1
A
Actor: Member
B
System: Library System
C
Oval: Book Loan
D
Member --- Borrow Book
Question 2
A
Actor: Customer
B
Box: Place Order
C
Customer --- Place Order
Question 3
A
Actor: Teacher
B
Oval: Roll Marking
C
Teacher --- Mark Roll
Question 4
A
Oval: Student
B
Oval: Submit Assignment
C
Student --- Submit Assignment
Question 5
A
Actor: Patient
B
Oval: Book Appointment
C
Patient Book Appointment
Answer Key
Use case diagram: use cases and associations
Section A: Quick Questions
Q1
B — As an oval inside the system boundary
Q2
A — Borrow Book
Q3
A — A goal an actor achieves with the system
Q4
A — An association line
Q5
B — Pay Fine
Section B: Match the Pairs
Q1
(Borrow Book) oval → A use case: a goal the actor achieves with the system, drawn as an oval and named with a verb phrase
Q2
Student ——— (Check Timetable) → An association line joining the Student actor to the Check Timetable use case
Q3
A use case should be named with a verb first, so it describes an action the actor wants to do → (Reset Password)
Q4
Each use case oval is connected to the actor who achieves that goal by an association line → Customer ——— (Place Order)
Q5
(Password) → The use case is named with a noun only. It should use a verb phrase that states a goal, such as Reset Password.
Q6
Teacher (Enter Marks) → There is no association line between the actor and the use case. A line must join Teacher to Enter Marks.
Section C: Definitions
Q1
use case — A goal an actor achieves with the system. It is drawn as an oval named with a verb phrase (e.g. Borrow Book) and joined to its actor by an association line.Section D: Fill in the Blanks
Q1
Actor shape: stick figure
Use case shape: ovalQ2
Member --- (Borrow Book)Q3
Use case name = verb + noun
Example: Borrow BookQ4
Actor: Member
Use case: Borrow Book
Association: Member --- Borrow BookQ5
A use case is a goal an actor achieves
Example: Return BookSection E: Spot the Error
Q1
C — A use case must be named with a verb phrase that states a goal. 'Book Loan' is a noun phrase. It should be 'Borrow Book'.
Q2
B — A use case is drawn as an oval, not a rectangle. The line should be 'Oval: Place Order'.
Q3
B — 'Roll Marking' is a noun phrase, so it does not show the goal as an action. Name the use case with a verb first: 'Mark Roll'.
Q4
A — A student is an actor, not a use case. Actors are drawn as stick figures, and only goals go in ovals. The line should be 'Actor: Student'.
Q5
C — An actor must be joined to its use case by an association line. Without the line the actor is not connected to the goal. It should be 'Patient --- Book Appointment'.