ISOM221+Lecture+16+-+Interaction+Diagrams+I - Agenda...

ISOM221
Information Systems Analysis and Design
Lecture 16:
Interaction Diagrams I (Sequence
Diagram)
1
Agenda
• Understand the relationship between the
behavioral models and the structural and
functional models
• Understand the rules and style guidelines for
sequence diagram
• Understand the processes used to create
sequence diagram
2
STUDENT
-STU_StudentID
-STU_LastName
-STU_FirstName
-STU_Username
-STU_Password
-STU_Address
-STU_Phone
-STU_Email
+ Register()
Some
Updates
on Last Class
SHORTLISTING_RECORD
-SR_ShortlistingID
-SR_ShortlistingDate
-SR_Status
+ Add ()
+ Delete()
+ Update_Status()
has
1 0..10
is included in
0..*
Access to contact
+ Login()
OWNER
-OWN_OwnerID
-OWN_LastName
-OWN_FirstName
-OWN_Username
-OWN_Password
-OWN_Address
-OWN_Phone
-OWN_Email
+ Insert()
+ Read_Contact()
APARTMENT
-APT_ApartmentID
-APT_Address
-APT_Size
-APT_Bedroom
-APT_Rent
-APT_PostingDate
+ Insert()
+ Delete()
+ Match_Search_Criteria()
+ Show_Matched_Results()
has
1 0..*
1
3
information in the OWNER
class must be allowed in
order to generate the search
results by
“Show_Matched_Results()”
in the APARTMENT class
Structural vs. Behavioral Models
• Systems have static & dynamic characteristics
– Structural models describe the static aspects of the system
(Class diagram in Lecture 15)
– Behavioral models describe the dynamics and interactions
of the system and its components
• Behavioral models describe
– The internal dynamic aspects of an information system
that supports business processes in an organization
– The interaction between the classes (objects) in the
structural models to support the use cases in a time-
ordered manner
4

Why Do We Care About Class Behaviors?
• Class diagram is static
– It tells you “what” should happen, not “how” it occurs
– Need to get a more dynamic view of the classes in
order to be able to code the system
•