1. SOEN 343 Software Design
Computer Science and Software Engineering Department
Concordia University
Fall 2005
Instructor: Patrice Chalin

2. Agenda – Lecture 12b …
11/23/2018
SOEN 343, © P.Chalin,

3. How do I come up with a design?
Recall …
Way back in week 5b we asked the question …
How do I come up with a design?
11/23/2018
SOEN 343, © P.Chalin,

4. How Do I Come Up With a Design?
What are the inputs to the activities of design?
What are the outputs?
11/23/2018
SOEN 343, © P.Chalin,

5. Design Activities: Inputs & Outputs
Product requirements
Project plan
Architectural factors …
Architecture Document
Architectural Style(s) …
11/23/2018
SOEN 343, © P.Chalin,

6. Design Input: SRS
What is contained in the SRS? (name some of its parts)
Answer is on next slide
11/23/2018
SOEN 343, © P.Chalin,

7. Design: From SRS to ... Domain Model Use Case Model Design Model
Control Style / Pattern
User-interface design …
11/23/2018
SOEN 343, © P.Chalin,

8. Design Model Classes
Domain Model often used as first approximation to Design Model.
Domain Model contains
Conceptual classes
Conceptual classes used as basis for similarly named design classes.
(E.g. Larman, Chapter 16, p. 222.)
11/23/2018
SOEN 343, © P.Chalin,

9. Presentation Domain Data Source EA Patterns Page Controller
Template View
Presentation
Front Controller
Transform View
Domain Model
Transaction Script
Domain
Data Mapper
Active Record
Table Module
Row Data Gateway
Table Data Gateway
Data Source
11/23/2018
SOEN 343, © P.Chalin,

10. Enterprise Applications:Domain Model
Requirements Domain Model
Design Model: classes Domain Model pattern
11/23/2018
SOEN 343, © P.Chalin,

11. From Requirements to Design
Requirements artifacts:
e.g.
Domain Model
Use Case Model
Design artifacts: e.g.
Software Architecture Document
Design Model
User-interface design …
11/23/2018
SOEN 343, © P.Chalin,

12. Conceptual Classes to Design Classes
Domain Model pattern
Domain Model pattern
11/23/2018
SOEN 343, © P.Chalin,

13. Representational Gap Larman, Section 17.2:
The object developer has taken inspiration from the real-world domain in creating software classes. Therefore, the representational gap between how stakeholders conceive the domain, and its representation in software, has been lowered.
11/23/2018
SOEN 343, © P.Chalin,

14. From Rich Conceptual Domain Model to Rich set of Domain Model classes
Rich Conceptual Domain Model will usually translate into a rich set of Domain Model classes.
11/23/2018
SOEN 343, © P.Chalin,