Why is it important to keep requirements up to date during and after development?

Because outdated requirements drive wrong implementations, waste testing effort, and make maintenance and onboarding impossible — they must track changes in understanding, stakeholders, and environment.

Requirements must be maintained ("Keep them up2date"):

React to actual situation:

• Requirements change as understanding grows
• Business environment changes

Reflect changes on environment:

• Stakeholder changes (new users, changed priorities)
• System boundaries may shift
• Other circumstances (regulations, market, technology)

Why this matters:

• Outdated requirements lead to wrong implementations
• Testing against old requirements wastes effort
• Maintenance becomes impossible without accurate docs
• New team members need current documentation

Best practice: Treat requirements like code - version control, reviews, and regular updates.