Functional Requirements :Requirements, which are related to functional aspect of software fall into this category.They DEFINE functions and FUNCTIONALITY WITHIN and from the software system.

EXAMPLES -

• Search option GIVEN to user to search from various invoices.
• User should be able to mail any report to management.
• Users can be divided into groups and groups can be given separate rights.
• Should comply business rules and administrative functions.
• Software is developed keeping downward compatibility intact.

Non-Functional Requirements :Requirements, which are not related to functional aspect of software, fall into this category. They are implicit or EXPECTED characteristics of software, which users make assumption of.

Non-functional requirements include -

• Security
• Logging
• Storage
• Configuration
• Performance
• Cost
• Interoperability
• Flexibility
• Disaster recovery
• Accessibility

Functional Requirements :Requirements, which are related to functional aspect of software fall into this category.They define functions and functionality within and from the software system.

EXAMPLES -

Non-Functional Requirements :Requirements, which are not related to functional aspect of software, fall into this category. They are implicit or expected characteristics of software, which users make assumption of.

Non-functional requirements include -