Functional Safety according to IEC 61508 / IEC 26262

(Available for Pro Versions of IQ Software)

The quantitative analysis for the functional safety of a system is becoming more and more important. Based on failure net methods, APIS IQ-Software offers to evaluate and calculate the necessary criteria.

For the top level failures of a system, IQ software calculates the PFH value (Probability of Failure per Hour: Average probability of failure of a safety function working in high demand or continuous mode of operation). APIS IQ-Software also calculates the SFF value (Safe Failure Fraction : Percentage part of safe failures and dangerous detected failures of a safety function or a subsystem related to all failures). The computed values are compared to the specifications and divergences that are reported functional safety. -> Functional Safety

The classification of top failures according to risk categories (Safety Integrity Level (SIL): Four discrete levels (SIL1 to SIL4). The higher the SIL of a safety-related system, the lower the probability that it will not perform the required safety functions) as well as their diagnostic coverage (DC) and the failure rate (FIT value) of the basic failures can be input in the Properties Dialogue or the Object Inspector. --> Entering values