Lười biếng

Activity diagram Activity diagrams are widely used in system analysis and design to model the behavior of a system, particularly for business processes and workflows. In system analysis and design, activity diagrams are used to model the steps or activities involved in a particular process or use case scenario. Activity diagrams in system analysis and design typically have the following characteristics: Start and end points: The diagram should begin with a start point, which represents the initiation of the process or use case, and end with an end point, which represents the completion of the process or use case. Actions: The actions or steps involved in the process or use case should be represented by rectangular boxes, and the actions should be organized in a logical sequence. Control flow: The flow of control between actions should be represented by arrows. Arrows should indicate the order in which actions are performed and the conditions that determine the path of the process or us

Use Case Diagram A use case diagram is a type of diagram used in system analysis and design to represent the interactions between users (or actors) and a system. It illustrates the different ways in which users can interact with the system and the different tasks or use cases that the system supports. Use case diagrams consist of the following components: Actors: These are the entities (e.g. users, external systems, or devices) that interact with the system. Use cases: These are the tasks or functions that the system supports. Each use case represents a specific goal or activity that a user can perform within the system. Relationships: These show the associations between actors and use cases. The relationships can be one-to-one, one-to-many, or many-to-many. System boundary: This is a box that contains all the use cases and actors that are part of the system. Use case diagrams are useful for identifying the different user roles and their interactions with the system, as well as the spe

Diagrams in System Analysis and Design In system analysis and design, diagrams are used to represent the different aspects of a system, its components, and their interactions. The main types of diagrams used in system analysis and design include: Use case diagrams: This type of diagram is used to describe the functionality of a system from the user's perspective. It shows the different use cases (or scenarios) in which a user interacts with the system, as well as the actors (or users) who are involved in those interactions. Activity diagrams: This type of diagram is used to represent the flow of activities within a system. It shows the sequence of activities and decisions involved in a particular process or use case. Sequence diagrams: This type of diagram is used to represent the interaction between objects in a system. It shows the sequence of messages exchanged between objects in a particular scenario or use case. Class diagrams: This type of diagram is used to represent the str