Fault Tree Analysis (FTA): The Ultimate Guide for Engineers
Interactive Fault Tree Analysis Explorer Fault Tree Analysis Explorer Fundamentals Methodology Analysis Tools Case Studies Deconstructing Failure, Engineering Safety. Welcome to the Interactive Fault Tree Analysis (FTA) Explorer. This application translates the comprehensive principles of FTA into a dynamic, explorable experience. Discover the core concepts, methodologies, and real-world applications of this powerful risk assessment technique. […]
SIL Determination TOOL Using Risk Matrix – IEC 61511
Interactive SIL Determination Application SIL Determination Hub Home Framework Calculator Lifecycle HomeFrameworkCalculatorLifecycle Understanding Functional Safety This application translates the complex IEC 61511 standard into an accessible, interactive experience. Explore the core principles of functional safety, understand how risk is quantified, and use the interactive tool to determine Safety Integrity Levels (SIL) for your own scenarios. […]
IEC 61508 SIL Risk Graph Tool (C/F/P/W, Low-Demand)
SIL Risk Graph Calculator · IEC 61508 (C/F/P/W) SIL Risk Graph Calculator IEC 61508 C/F/P/W method. Choose levels and click Calculate to get the resulting SIL. (Orientation aid only; validate per your company’s standard and the latest IEC 61508/61511.) Calculate Reset Print C — Consequence (injury severity) C1 — Slight injuryC2 — Serious irreversible injury […]
PFDavg calculations for your Safety Instrumented Functions (SIF)
SIF PFDavg Calculator (1oo1, 1oo2, 2oo2, 2oo3) SIF PFDavg Calculator MVP Project Name SIF Tag Number Preparer Date λd Units FIT (failures / 109 hours)1/hr Changing this converts λd numbers in-place. Compute Export PDF Export Excel Run Self Tests Inputs Trip Initiator Architecture 1oo11oo22oo22oo3 λd FIT DC (0–1) PTC (0–1) Proof Test Interval T (hr) […]
SIL Determination using Layer of Protection Analysis (LOPA)
Interactive LOPA & SIL Determination Tool Interactive LOPA & SIL Determination Tool Section 1: Foundational Concepts of LOPA 1.1 The Philosophy of Defense-in-Depth The core principle underpinning modern process safety is “defense-in-depth.” This philosophy acknowledges that no single safety measure is perfect and that catastrophic events typically result from a series of failures, not just […]
Functional Safety Architectures: An Interactive Guide to 1oo1, 1oo2, 2oo2 & 2oo3
Functional Safety Architectures Explained Functional Safety Architectures An interactive guide to 1oo1, 1oo2, 2oo2, and 2oo3 systems. Click the “Fail” buttons to simulate a component failure and observe the system’s reaction. 1oo1 (One-out-of-One) The simplest architecture with no redundancy. Any single failure can lead to a loss of the safety function. S1 PLC OUT System […]
Functional Safety Architectures: 1oo1 vs 1oo2 vs 2oo2 vs 2oo3 Explained
In functional safety, the primary difference between 1oo1, 1oo2, 2oo2, and 2oo3 configurations lies in their levels of fault tolerance and their behavior upon failure. A 1oo1 system is the simplest but has no redundancy. 1oo2 prioritizes safety, tripping if one channel fails. 2oo2 prioritizes availability, requiring two channels to trip, making it less safe. […]
Visual explanation of the 1oo2 (one-out-of-two) safety architecture
IEC 61511: 1oo2 Architecture Explained 1oo2 Architecture Explained A visual guide to the “One-out-of-Two” voting logic in Safety Instrumented Systems (IEC 61511). Interactive System Diagram Sensor A Sensor B Logic Solver (1oo2) Trips if A OR B detects hazard Final Element VALVE OPEN Normal Operation Hazard (Sensor A) Hazard (Sensor B) Spurious Trip (A) How […]
Understanding Probability of Failure on Demand (PFD)
PFD & SIL Visualizer (IEC 61511) Understanding Probability of Failure on Demand (PFD) An Interactive Visual Guide based on IEC 61511 for Low Demand Mode What is PFD? Probability of Failure on Demand (PFD) is a measure of the reliability of a safety function. It represents the likelihood that a safety system (like an emergency […]
Random vs. Systematic Failures in Functional Safety
Random vs. Systematic Failures in Functional Safety and the Crucial Role of SIL In the world of industrial automation and safety-critical systems, the silent sentinels of functional safety stand guard, protecting against catastrophic events. These systems, whether in a sprawling chemical plant, a complex power grid, or a sophisticated medical device, are designed to prevent […]