Table 1 Software aging management information
From: Discussion on software aging management of nuclear power plant safety digital control system
| Phase | Software aging management related information | Collection method |
|---|---|---|
| Design | Performance requirements (precision, response time, etc.) | Review and analysis |
| Fault-avoidance technology | ||
| Self-diagnosis technology | ||
| Self-supervision technology | ||
| Safety and security technology | ||
| System stability and reliability outside factors, e.g. environment | ||
| Implementation | Design deviation | Traceability analysis |
| Software configuration | Feedback and evaluation | |
| Assumptions and boundary | ||
| Data and structure specification | ||
| Input and output specification | ||
| Weak spot of the software development | ||
| Test | Large date volume test | Software validation and verification |
| Carrying capacity | Testing | |
| Concurrency capacity | ||
| Fatigue strength | ||
| Fault-tolerant ability | ||
| Network quality (clock recovery, network timing and packet loss, etc.) | ||
| Abnormal problems | ||
| Operation | Accumulation of round-off errors | Feedback and statistics |
| Aging-related bugs | Evaluation | |
| Resource exhaustion, e.g. CPU, disk memory and network, etc | ||
| Unplanned failures | ||
| Maintain | Maintain records | Power plant feedback |
| Upgrade records | Evaluation |