To generate a precise risk profile, SIRAC requires the user to input data across four primary categories: 1. Structural Dimensions
The final step involves creating a plan to implement the recommended controls and verifying their effectiveness. simplified iec risk assessment calculator sirac
Allows designers to quickly change inputs (e.g., increasing safety measures to reduce P) and immediately see the impact on the required SIL. To generate a precise risk profile, SIRAC requires
When the IEC 61508/61511 standards were written, they demanded layers of complexity—Layer of Protection Analysis (LOPA), Hazard and Operability Studies (HAZOP), and quantified failure rates. Then came SIRAC to help small to medium enterprises (SMEs) and less critical applications get a grip on functional safety. When the IEC 61508/61511 standards were written, they
| Tool | Complexity | Best for | Output | |------|------------|----------|--------| | | Low | Machine safety, SMEs | SIL/PL required | | Risk graph (IEC 62061) | Medium | General machine control | SIL | | LOPA (Layer of Protection Analysis) | High | Process industry (chemical, oil) | Independent protection layers | | FMEA | Medium | Component failure analysis | RPN (Risk Priority Number) |
SIRAC evaluates risk by breaking it down into four distinct categories defined by the IEC. The calculator assesses each applicable risk to see if it exceeds the tolerable risk limit ( RTcap R sub cap T ) established by international standards. Risk 1 ( R1cap R sub 1