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

Software Requirements are documented needs and expectations of users and stakeholders that a software system must fulfill.

In Other words Requirements define what the system should do and how it should behave.

Why Requirements Matter

1. They define project scope

2. They reduce misunderstandings

3. They prevent scope creep

4. They form the foundation for design, development & testing

Types of Requirements

1. Business Requirements

2. User Requirements

3. System Requirements

Example

If we are building an E-commerce website:

1. Users must be able to register

2. Users must be able to add products to cart

3. Payment gateway integration must be available

4. System should load within 3 seconds