Dedicated fire safety equipment shall be robust and reliable.
Sprinkler system is specific in that it cannot be actually tested because it is only triggered by elevated ambient temperature. However, the design and the installed equipment can be verified by an inspection, which is more difficult than design because there is less time for it. Sprinkler system securing foreign investments are inspected by global safety inspectors and representatives of insurance companies.
For reliability of single components and sprinkler systems, see link A review of sprinkler system effectiveness studies.
The requirement for greater reliability brings with it greater costs, so it is necessary to consider what technical solution is appropriate to the risks being protected. Achieving the maximum possible reliability is quite complex.