SDLC_and_Design_Process_Lecture2 for Software Engi

Software design and architecture class

1. Software Development Life Cycle (SDLC) & Design Process Software Design and Architecture - Lecture 2

2. Agenda • What is SDLC? • Phases of SDLC • Importance of SDLC • Software Design Process • Relationship between SDLC and Design • Summary & Key Takeaways

3. What is SDLC? • SDLC stands for Software Development Life Cycle. • It is a structured process for developing software. • Ensures quality, reliability, and cost-effectiveness. • Involves planning, designing, building, testing, and deploying software.

4. Phases of SDLC (Overview) 1. Requirement Analysis 2. System Design 3. Implementation (Coding) 4. Testing 5. Deployment 6. Maintenance

5. SDLC Cycle 🔄 SDLC Phases: Requirement → Design → Implementation → Testing → Deployment → Maintenance

6. Requirement Analysis • Gather user requirements. • Identify functional and non-functional needs. • Involves stakeholders, users, and analysts. • Output: Software Requirement Specification (SRS).

7. System Design • Defines system architecture and detailed design. • Translates requirements into a blueprint. • Includes data models, UI designs, and architecture diagrams. • Output: Design Documents.

8. Implementation (Coding) • Developers write code based on design documents. • Programming languages and tools are chosen. • Code is written, compiled, and documented. • Output: Source Code.

9. Testing • Ensures software works as intended. • Types: Unit Testing, Integration Testing, System Testing, User Acceptance Testing. • Identifies and fixes bugs. • Output: Tested Software.

10. Deployment & Maintenance Deployment: • Software is released to users. • Training and documentation provided. Maintenance: • Fixing bugs after release. • Updating software with new features. • Ensuring long-term reliability.

11. Software Design Process • High-level Design (Architecture): Overall structure. • Low-level Design: Detailed class, module, and function design. • Emphasis on Modularity, Reusability, and Maintainability. • Bridges the gap between requirements and coding.

12. Software Design Process (Diagram) 📊 Layers: Requirements → High-Level Design → Low-Level Design → Coding

13. Summary & Key Takeaways • SDLC = Step-by-step software development process. • Key Phases: Requirement, Design, Implementation, Testing, Deployment, Maintenance. • Software Design = Translating requirements into architecture and modules. • Good design ensures scalable, maintainable, and secure software.