CSE563 Lecture 14

Software Requirements and Specification
Midterm Review (updated)
(202110)

Transcript

1. jgs CSE 563 Software Requirements and Specification Lecture 14: State Machine Diagram Dr. Javier Gonzalez-Sanchez javiergs@asu.edu javiergs.engineering.asu.edu | javiergs.com PERALTA 230U Office Hours: By appointment
2. jgs Previously … Where can I put the details ?
3. jgs Fall 2021 | 00000001 Use Case Template Number and Name < the name is the goal as a short active verb phrase> Goal / Description < a longer statement of the goal in context if needed > Pre-conditions <what we expect is already the state of the world> Success End Condition <the state of the world upon successful completion> Failed End Condition <the state of the world if goal abandoned> Actors <a role name or description for the primary actor> <other systems relied upon to accomplish use case> Trigger <the action upon the system that starts the use case> Description step action 1 <put here the steps of the scenario from trigger to goal delivery, and any cleanup after> 2 <...> 3
4. jgs Fall 2021 | 00000001 Example Number Name Goal/ Description Pre-conditions Success End Condition Failed End Condition Actors Trigger Description
5. jgs Fall 2021 | 00000001 Behavioral Modeling § A graphical representation of the flow of interaction. Create a activity diagram for each use-case. § A list of the different states of a system. Build a state diagram for the system. § They are not mandatory, § They are an option to natural language § They can be combined.
6. jgs Fall 2021 | 00000001 Example with Pacman http://gameinternals.com/post/2072558330/ understanding-pac-man-ghost-behavior
7. jgs Fall 2021 | 00000001 The Red Ghost (Blinky)
8. jgs State Machine Diagram
9. jgs Fall 2021 | 00000001 State machine models § Model the behaviour of the system in response to external and internal events. § State machine models show system states as nodes and events as arcs between these nodes. When an event occurs, the system moves from one state to another. State ~ Data Event ~ Change in Data
10. jgs Fall 2021 | 00000001 Note Think about global data that control behaviors
11. jgs Fall 2021 | 00000001 Notation § Simple state is shown as a rectangle with rounded corners and the state name inside the rectangle. § composite state is defined as state that has substates (nested states). § An initial state represents a default vertex that is the source for a single transition. There can be at most one initial vertex. The outgoing transition from the initial vertex may have not a trigger or guard. § Final state is a special kind of state signifying that the enclosing region is completed. § A transition is a directed relationship between a source vertex and a target vertex. § Junctions
12. jgs Fall 2021 | 00000001 Example state machine diagram
13. jgs Fall 2021 | 00000001 Example state machine diagram
14. jgs Fall 2021 | 00000001 Example state machine diagram
15. jgs Fall 2021 | 00000001 Example state machine diagram
16. jgs Fall 2021 | 00000001 Example state machine diagram
17. jgs Pac-Man Video Game Examples of State machine Diagrams
18. jgs Fall 2021 | 00000001 The Red Ghost (Blinky) – Activity Diagram
19. jgs Fall 2021 | 00000001 Pac-Man What about: § New § Hunter § Hunted § Eaten
20. jgs Fall 2021 | 00000001 Ghost States - State Machine Diagram
21. jgs Fall 2021 | 00000001 Ghost States - State Machine Diagram
22. jgs Fall 2021 | 00000001 Pacman States - State Machine Diagram
23. jgs Fall 2021 | 00000001 Pacman States - State Machine Diagram
24. jgs Homework
25. jgs Fall 2021 | 00000001 Pac-Man http://gameinternals.com/post/2072558330/understanding-pac-man-ghost-behavior § Use Case Diagram § Use Case Description (per Oval) § Activity Diagram (where/how many are needed?) § State Machine Diagram (where/how many are needed?)
26. jgs Fall 2021 | 00000001 Space Invaders https://en.wikipedia.org/wiki/Space_Invaders § Use Case Diagram § Use Case Description (per Oval) § Activity Diagram (where/how many are needed?) § State Machine Diagram (where/how many are needed?)
27. jgs Fall 2021 | 00000001 Game of Life https://playgameoflife.com/info § Use Case Diagram § Use Case Description (per Oval) § Activity Diagram (where/how many are needed?) § State Machine Diagram (where/how many are needed?)
28. jgs Fall 2021 | 00000001 Assignment § Submit one PDF file per project § Due date before the exam– it will help you to study for your exam § Work individually § Please, follow academic integrity policies
29. jgs Fall 2021 | 00000001 Questions
30. jgs CSE 563 Software Requirements and Specification Javier Gonzalez-Sanchez, Ph.D. javiergs@asu.edu Fall 2021 Copyright. These slides can only be used as study material for the class CSE563 at ASU. They cannot be distributed or used for another purpose.