jgs CSE 563 Software Requirements and Specification Lecture 14: State Machine Diagram Dr. Javier Gonzalez-Sanchez [email protected] javiergs.engineering.asu.edu | javiergs.com PERALTA 230U Office Hours: By appointment 

jgs Previously … Where can I put the details ? 

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 Success End Condition Failed End Condition Actors Trigger Description step action 1 2 <...> 3 

jgs Fall 2021 | 00000001 Example Number Name Goal/ Description Pre-conditions Success End Condition Failed End Condition Actors Trigger Description 

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. 

jgs Fall 2021 | 00000001 Example with Pacman http://gameinternals.com/post/2072558330/ understanding-pac-man-ghost-behavior 

jgs Fall 2021 | 00000001 The Red Ghost (Blinky) 

jgs State Machine Diagram 

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 

jgs Fall 2021 | 00000001 Note Think about global data that control behaviors 

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 

jgs Fall 2021 | 00000001 Example state machine diagram 

jgs Fall 2021 | 00000001 Example state machine diagram 

jgs Fall 2021 | 00000001 Example state machine diagram 

jgs Fall 2021 | 00000001 Example state machine diagram 

jgs Fall 2021 | 00000001 Example state machine diagram 

jgs Pac-Man Video Game Examples of State machine Diagrams 

jgs Fall 2021 | 00000001 The Red Ghost (Blinky) – Activity Diagram 

jgs Fall 2021 | 00000001 Pac-Man What about: § New § Hunter § Hunted § Eaten 

jgs Fall 2021 | 00000001 Ghost States - State Machine Diagram 

jgs Fall 2021 | 00000001 Ghost States - State Machine Diagram 

jgs Fall 2021 | 00000001 Pacman States - State Machine Diagram 

jgs Fall 2021 | 00000001 Pacman States - State Machine Diagram 

jgs Test Yourselves 

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?) 

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?) 

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?) 

jgs Assignment 

jgs Fall 2021 | 00000001 Assignment § View this video https://youtu.be/BcfALBQpKjY It is my presentation of a project for a Software Design course. There are A LOT of technical details Technical details are NOT to be in a Requirement Specification 

jgs Fall 2021 | 00000001 Assignment Create a Software Requirements Specification including a) Mandatory. A Use Case Diagram (showing all the actors, requirements, and relationships as needed) b) Mandatory. Per each Use Case, complete a Use Case Template. Yes, the one with triggers, pre-conditions, etc. etc. etc. Use all as needed. c) Question (you tell me). Per each Use Case, Do an activity diagram is need here or plain English? When and How to choose one or the other? d) Question (you tell me). Per each Use Case, Do a state machine diagram is need here or plain English? When and How to choose one or the other? 

jgs Fall 2021 | 00000001 Assignment § Hint. It is a mixture or Game Of Line and Another Video that I asked you to watch and report before § Hint. TSP (mentioned in the video) is a Technical Concept. User do not know that thing. Should I explain or ignore? If explain where? How? § What is the goal of all this (each diagram and each row in the template)? § How many diagrams? As needed. § How do I know if I have everything? Remember Storyboarding… 

jgs Fall 2021 | 00000001 Assignment § Submit one PDF file § Due date Friday 11:59 PM AZ Time § Work in a team of 1, 2 or 3. No, more that 3 are not allowed. It is a team assignment for you to have the chance to share ideas and brainstorm a solution § Follow academic integrity policies. Yes, helping friends in need by sharing your work with them IS an academic integrity violation (if they decided to submit what you share as their own) 

jgs Fall 2021 | 00000001 Questions 

jgs CSE 563 Software Requirements and Specification Javier Gonzalez-Sanchez, Ph.D. [email protected] 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.