1. System Development Process
Instructor: Chien-Ho Ko

2. Outlines Introduction Iterative process VS waterfall UML
System analysis
System design

3. Introduction Why do we need a system development process?
Dog house VS high-rise building
Development time and cost
Maintenance
How do you program?

4. Introduction What process do we need?
Unified process, recommended process and models
Incremental and iterative process
UML

5. Iterative Process VS Waterfall
Plan & Elaborate
Sequential, linear life cycle
Build
Deploy

6. Iterative Process VS Waterfall
Problems in waterfall:
Delayed risk, tackling high risk/difficult problems late
Requirements and design speculation and inflexibility
High complexity
Low adaptability

7. Iterative Process VS Waterfall
Recommended process and models
Deploy
Plan & Elaborate
Build
Development Cycle 1
Development Cycle 2 …
How many cycles do we need?
Refine Plan
Analyze
Design
Construct
Test
How long does it take?
When do we use this concept? EX: Thesis.

8. Iterative Process VS Waterfall
Analysis
Design
Test
Plan …
Maintenance
Implement

9. Iterative Process VS Waterfall
Mitigate problems in waterfall:
Delayed risk
Iterative
Waterfall
Impact of Risk
Time
Time

10. Iterative Process VS Waterfall
Risk problems in waterfall:
Speculation and inflexibility
1.Cannot envision until seeing systems
2. Market changes
3. Correctly validate is a challenge
Creeping requirements
Project size in function points

11. Unified Modeling Language
What is UML?
OMG: “The UML is a language for specifying, visualizing, constructing, and documenting the artifacts of software systems, as well as for business modeling and other non-software systems”
1994: Grady Booch, Jim Rumbaugh, Ivar Jacobson

12. Unified Modeling Language
Why UML?
1997: adopted as a standard by OMG
Visualization
A set of Solutions
Class Diagram
Collaboration Diagram
Package Diagram
State Diagram
Activity Diagram
Deploy Diagram
Use Case Diagram

13. System Analysis What is analysis?
An investigation of a domain that results in models describing its static and dynamic characteristics. It emphasizes questions of “what,” rather then “how.”
It emphasizes an investigation of problem and requirements, rather then a solution.
Requirement Analysis!

14. System Analysis Activities in Analysis Development Cycle 1…
Refine Plan
Analyze
Design
Construct
Test
Define Essential Use Case
Define Use Case Diagram
Refine Conceptual Model
Refine Glossary
Define System Sequence Diagram
Define Operation Contracts
Define State Diagrams

15. System Design What is system design?
A process that uses the products of analysis to produce a specification for implementing a system.
A logical description of how a system works.

16. System Design System Design Activities Development Cycle 1…
Refine Plan
Analyze
Design
Construct
Test
Define Real Use Case Diagram
Refine Reports and UI
Refine System Architecture
Define Interaction Diagram
Define Class Diagram
Define Database Schema