Non-functional Requirement Metrics
- Time
- Transactions / sec
- Response time
- Time to complete an operation
- Space
- Main memory
- Auxiliary memory
- (Cache)
- Usability
- Training time
- Number of choices
- Mouse clicks
- Reliability
- Mean time to failure
- Downtime probability
- Failure rate
- Availability
- Robustness
- Time to recovery
- % of incidents leading to catastrophic failures
- Data corruption probability after a failure
- Portability
- % of non-portable code
- Number of systems where software can run