Chris Johnson, Index

---

Fault Detection

• Functionality checks:
  - routines to check hardware works.
  
  
• Signal Comparisons:
  - compare signal in same units.
  
  
• Information Redundancy:
  - parity checking, M out of N codes...
  
  
• Watchdog timers:
  - reset if system times out.
  
  
• Bus monitoring:
  - check processor is `alive'.
  
  
• Power monitoring:
  - time to respond if power lost.

---