Requirement (five-step method)

Collect, classify, map, and review requirements.
1. collection requirements
Source of demand

• Vision document ). This document describes the business requirements and the blueprint for developing a successful system.
• Pre-arranged document (walkthrough document ). These documents are a set of "Daily Life" descriptions of how users interact with the system.
• Domain glossary. This is the language used by end users.
• Domain experts and end users talk.
• Functional specifications and work statement.

2. Requirement Classification