1. Computer Science & Engineering Electrical Engineering
EE 472 – Embedded Systems
Dr. Shwetak Patel
Assistant Professor
Computer Science & Engineering
Electrical Engineering

2. Agenda Engineering Design Cycles Structured Design
Unified Modeling Language (UML) 2
Shwetak N. Patel - EE 472

3. Why care about the design process?

4. Makes development efficient!
Easy to fall into the trap of ah-hoc building
Spending 1 hour planning can save 10 hours debugging!! 4
Shwetak N. Patel - EE 472

5. The Development Cycle Product specifications to final product 5
Shwetak N. Patel - EE 472

6. The Development Stages
Requirements analysis and specs
Conceptual design
Detailed program design
Implementation
Unit and integration testing
System testing
System delivery
Maintenance 6
Shwetak N. Patel - EE 472

7. Example Development Life Cycle Models
The Waterfall Model
V cycle
Spiral
Rapid Prototyping
Agile Methods 7
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8. Waterfall Model 8
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9. V Cycle 9
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10. Spiral 10
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11. Rapid Prototyping Break the problem into little pieces
Get a front-end implementation out quick 11
Shwetak N. Patel - EE 472

12. Agile Methods Extreme Programming Sprints Scrum
Focus on small increments
Pair-wise or team programming
Sprints
Well defined quick tasks to get something out
Scrum
Quick meetings daily and/or weekly 12
Shwetak N. Patel - EE 472

13. The Actual Design Process
Key steps for success:
Requirement definitions
System specification
Functional design
Architectural design
Protoyping 13
Shwetak N. Patel - EE 472

14. Structured Design
Breaking down a problem and systematically deriving a solution
How do you represent this? 14
Shwetak N. Patel - EE 472

15. Unified Modeling Language (UML)
A “language” for specifying various aspects of the product during the design process
Universal way of sharing ideas 15
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16. Use Case Diagrams 16
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17. Sequence Diagrams 17
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18. Activity Diagram 18
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19. State Diagrams 19
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20. Class Diagrams 20
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21. Class Diagrams 21
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22. Summary of UML Diagrams22
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23. Class Exercise A person interacting with a digital camera 23
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24. Class Exercise Design a cruise control system for a car 24
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25. Class Exercise Model the interaction with an ATM machine 25
Shwetak N. Patel - EE 472