What is Software Design
Software design is a process to transform user requirements into some suitable form, which helps the programmer in software implementation.
It is the first step in SDLC after SRS (System requirement Specifications) analysis
it is he process of organizing a system into components, defining responsibilities, and specifying interactions so that the system:
- Is maintainable
- Is scalable
- Is testable
- Can evolve without breaking existing functionality
Design happens at multiple abstraction levels, primarily:
- High-Level Design (HLD) → architectural view
- Low-Level Design (LLD) → implementation view
High-Level Design vs Low-Level Design
From Architecture to Code, Principles to Patterns
Software design is the bridge between requirements and code.
It answers two fundamental questions:
- What are we building, and how is it structured? → _High-Level Design_
- How exactly will we implement it in code? → _Low-Level Design_
Good software systems succeed not because of clever code, but because of clear design boundaries, strong principles, and appropriate patterns applied at the right level.