Functional Suitability is a key software quality characteristic defined in ISO/IEC 25010, which evaluates how well a system, product, or component meets specified functional requirements. It ensures that the software provides correct, complete, and appropriate functions to meet user needs.
Key Attributes of Functional Suitability
Functional suitability consists of three main sub-characteristics:
- Functional Completeness
- Measures if the software provides all necessary functions to fulfill the intended requirements.
- Example: A NetSuite Sales Order Processing module should include order creation, tax calculation, payment processing, and invoicing.
- Functional Correctness
- Ensures that functions produce the correct results as per requirements.
- Example: If a discount is applied in NetSuite, the system must accurately reflect the price reduction in the invoice.
- Functional Appropriateness
- Determines if the functions are relevant, efficient, and aligned with user goals.
- Example: In NetSuite, an auto-generated invoice for recurring orders eliminates manual effort and improves efficiency.
Example Test Cases for Functional Suitability in NetSuite
Test Case ID Test Scenario Functional Suitability Attribute
TC_01 Verify that a sales order can be created successfully -> Functional Completeness
TC_02 Validate tax calculations in invoices -> Functional Correctness
TC_03 Verify that the system prevents duplicate invoices -> Functional Correctness
TC_04 Check if bulk order processing is available -> Functional Completeness
TC_05 Verify automated email notifications for order status updates -> Functional Appropriateness
Why is Functional Suitability Important?
- Ensures software reliability and user satisfaction.
- Helps prevent defects related to incorrect or incomplete functionality.
- Supports regulatory compliance by ensuring business-critical operations work as expected.