Software Development Lifecycle (SDLC): End-to-End Overview

What is System Design?

System Design is the process of defining the architecture, components, modules, interfaces, and data flow of a software system before development begins.

It acts as a blueprint for developers, similar to how an architect creates a blueprint before building a house.

The goal of system design is to transform requirements gathered in the previous phase into a structured technical solution.

Why System Design is Important

System design helps teams:

• 1. Understand how the system will work internally
• 2. Define interactions between components
• 3. Identify technologies and tools
• 4. Ensure scalability and performance
• 5. Reduce development errors

Key Elements of System Design

1. System Architecture

2. Database Structure

3. Data Flow

4. Component Interaction

5. Technology Stack

6. Security Considerations

7. Scalability Planning

Output of System Design Phase

1. High-Level Design (HLD)

2. Low-Level Design (LLD)

3. Architecture diagrams

4. Database design diagrams

4. API specifications