Field Testing evaluates system behaviour in real-world conditions. It occurs in the actual environment where the system will be used.
Key Aspects:
1. Tests in operational environment
2. Identifies real-world issues
3. Validate system performance
4. Involves end-users
5. Occurs late in the development cycle
Benefits:
1. Uncovers unexpected issues
2. Validate user experience
3. Tests system integration
4. Provides realistic performance data
5. Builds user confidence
Field testing is crucial for systems that interact with complex environments or have critical safety requirements.