SAD 7

• Systems Analysis and Design


  The process of defining the architecture, components, modules, interfaces, and data for a system to meet specific requirements
• Topics covered


  • Introduction
  • Project Initiation
  • Requirements Gathering
  • Process Modeling
  • Data Modeling
  • Modelling with UML
  • System Design
  • System Implementation
  • Project Management in Systems Development
  • Agile and Iterative Development
• System Design


  The process of translating the requirements of a system into a detailed design for implementation, focusing on the internal structure and behavior of the system
• System Design


  • Considers performance, scalability, reliability, maintainability, and security
  • Includes requirements analysis, system architecture design, subsystem design, component design, and data design
• System Architectural Design


  The conceptual model that defines how the system works and communicates with other systems
• System Architectural Design


  1. Identify system boundaries and external interfaces

  2. Define the overall architecture, including architectural styles, patterns, and design principles

  3. Allocate responsibilities to subsystems or modules to achieve modularity and separation of concerns
• Types of system architecture diagrams

  • Software architecture diagrams
  • Hardware architecture diagrams
  • Enterprise architecture diagrams
  • Collaborative systems architecture diagrams
  • Manufacturing systems architecture diagrams
  • Strategic system architecture diagrams
• Software architecture diagrams


  Illustrate the structure and behavior of software systems, including components, modules, interfaces, and their relationships
• Hardware architecture diagrams


  Visualize the physical components, devices, and connections within hardware systems
• Hardware architecture diagrams


  • Network Diagrams
  • Server Rack Diagrams
  • Circuit Diagrams
• Subsystem Design


  The process of planning, creating, and defining the individual subsystems within a larger system
• Subsystem Design


  1. Decompose the system into subsystems or modules based on functional requirements and architectural decisions

  2. Define the responsibilities and interfaces of each subsystem, specifying input/output data and communication protocols

  3. Ensure cohesion within subsystems and minimize coupling between them to promote reusability and maintainability
• Steps Involved in Subsystem Design

  1. Subsystem Identification

  2. Defining Subsystem Responsibilities

  3. Interface Design

  4. Internal Design of Subsystems

  5. Communication and Integration

  6. Testing and Validation
• Component Design


  Designing the internal structure and behavior of individual components within subsystems, focusing on implementation details and algorithms
• Data Design


  Designing the structure, organization, and management of data within the system, ensuring data integrity, security, and efficiency
• Data Design

  1. Identify the types of data required by the system and their relationships

  2. Design data models, ERDs or class diagrams, to represent the structure of the data

  3. Define data access and storage mechanisms, including database schemas, file formats, and data validation rules