Bài giảng UML cho lớp 55PM1, Khoa Công nghệ thông tin, Đại học Xây Dựng Hà nội, ngày 18 tháng 02 năm 2014

1. Use Case Diagram Examples
Created by using Visual Paradigm 10.2
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2. Use Cases Management
● Rank Use Cases
● The rank of a Use Case is determined by looking at its
business value
● Ranking Levels: High, Medium, Low
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3. Use Cases Management
● Prioritize Use Cases
● Is to determine which Use Case(s) to work on first
● The priority of a Use Case is determined by factors
following:
● Business Value of Use Case
● Availability of developers
● Dependency between Use Case
● List of risk
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4. Use Cases Management
● Setting Use Cases’ status
● The status of a Use Case is about how much the use
case is completed
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5. Use Case Specification
● Flow of Events
● Describe the scenarios of Use Case
● Example:
● Use Case: Buy Book
1. loop
1.1 Browse book details
1.2 Add the book to shopping cart
until finish shopping
2. Member call check out
3. List out books in shopping cart
extension 3.1 Change quantity of books
3.2 Confirm books to buy
4. Request shipping details …
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6. Use Case Specification
● Keywords for defining flow of events
extension: Enter extension for the selected step.
if: Enter conditional situation for the selected step.
else
if:
Insert
another
situation
under
If.
else: Insert it to control If and Else if.
clear control, go to previous condition and go to end.
while: Perform some actions as long as the condition
stated
in
the
while
clause
is
valid.
for each: Perform some actions by walking through each
item
as
stated
by
the
for
each
clause.
loop until: Perform some actions until condition stated in
loop
remaining
valid.
exit:
Exit
in
the
middle
of
loop.
jump: Insert jump to manipulate the sub-step after the
variable situation happened
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7. UML Diagram
Diagram III
Sequence Diagram
● What
is Lifeline? Messages?
Fragments?
● Sequence Diagram elements
Combine
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8. Sequence Diagram
● A Sequence Diagram models the collaboration of
objects based on a time sequence. It shows how
the objects interact with others in a particular
scenario of a use case.
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9. Sequence Diagram
● Elements
● Lifeline
● A lifeline represents an individual participant in the
interaction.
● A lifeline may represent an Actor, an Object, an
Entity, a Control, a Boundary
● Notation:
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10. Sequence Diagram
● Elements
● Message
● A message defines a particular communication
between Lifelines of an Interaction.
● Types of messages: Send message, Self
message, Return message, Call message, etc.
● Notation:
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11. Sequence Diagram
● Elements
● Alternative Combined Fragment
● An alternative combined fragment represents a
choice of behavior. At most one of the operands will
be chosen.
● Notation:
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12. Sequence Diagram
● Elements
● Loop Combined Fragment
● A loop combined fragment represents a loop. The
loop operand will be repeated a number of times.
● Notation:
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13. Sequence Diagram
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