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 | Â | |
Data and structure specification | Â | |
Input and output specification | Â | |
Weak spot of the software development | Â | |
Test | Large date volume test | Software validation and verification |
Carrying capacity | Testing | |
Concurrency capacity | Â | |
Fatigue strength | Â | |
Fault-tolerant ability | Â | |
Network quality (clock recovery, network timing and packet loss, etc.) | Â | |
Abnormal problems | Â | |
Operation | Accumulation of round-off errors | Feedback and statistics |
Aging-related bugs | Evaluation | |
Resource exhaustion, e.g. CPU, disk memory and network, etc | Â | |
Unplanned failures | Â | |
Maintain | Maintain records | Power plant feedback |
Upgrade records | Evaluation |