The reason is to offload the logic to detect failures from the actual request.

We know that timeout cannot be used to detect failures accurately.

Experienced operators on site are able to detect failures but these procedures are not followed due to decreased manpower.

The signal quality error test detects silent failures in the circuitry.

To detect failures, the system must have two physical processors for each logical, active processor.

The inability of some accountants to detect impending failures has prompted a growing number of lawsuits.

Burn-in procedures are used to detect early failures.

Since rail signal circuits must be highly reliable, special techniques are used to detect and prevent failures in the relay system.

All components of the system are permitted to participate in the role of "detecting" failures.

NDT is generally used to detect failures in components before the component fails catastrophically.