ISO 12100: From Risk Assessment to PLr — Feeding ISO 13849 Without Breaking Traceability

Date
2027-05-21
Location
Online
Host
Zach L

About this event

A live 30-minute expert session on From Risk Assessment to PLr — Feeding ISO 13849 Without Breaking Traceability (ISO 12100 — Machinery Risk Assessment). What We'll Cover: Where the ISO 12100 assessment ends and the ISO 13849 risk graph begins, and why PLr determination must trace to a specific hazard line Step-by-step: identify the safety function, take S, F and P from the calibrated risk estimate, derive PLr from the Annex A risk graph How each safety function maps back to the ISO 12100 record and forward to the safety requirements specification artifacts Common mistakes: PLr picked by habit ('everything is PLd'), S/F/P inconsistent with the ISO 12100 estimate, safety functions with no originating hazard The hazard-to-safety-function-to-PLr trace an assessor follows to challenge under- o

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About Functional Safety Foundations

This online session delivers expert-led instruction on the regulatory landscape and implementation approach for Functional Safety Foundations.

The cross-sector fundamentals underlying every functional safety standard: risk as severity × likelihood, the safety function concept, integrity levels, the safety lifecycle, and the split between random and systematic failures.

What it regulates

Shared vocabulary and reasoning: hazard → risk → risk reduction allocation → safety requirement → verified implementation → maintained integrity in operation.

Who must comply

Everyone entering the field — the conceptual base of the entire catalog.

Key requirements of Functional Safety Foundations

  • Hazard and risk fundamentals
  • Safety function anatomy: sensor-logic-actuator with defined safe state
  • Integrity ladders (SIL/PL/ASIL/DAL) as risk-reduction currencies
  • Random vs systematic failure treatment
  • Lifecycle and management of functional safety incl. competence

Key concepts: Functional Safety Foundations

Risk reduction allocation
Distributing required risk reduction among mechanical design, safeguards, control functions and procedures.
Functional safety management
Planning, competence, documentation and assessment wrapped around technical work.
Random vs systematic
Hardware wear-out/chance failures quantified statistically versus design/process errors controlled by rigor.
Safe state
The defined condition a function drives the equipment to on demand or fault.

Frequently asked questions: Functional Safety Foundations

Why can't testing alone prove safety?

Rare-event targets (like 1e-7/h) are unverifiable by test duration, and systematic errors evade random testing — hence the standards' dual machinery of quantified hardware analysis plus process rigor and independent assessment.

Standard information based on the published text of Functional Safety Foundations. Event content is provided by the host. For authoritative guidance, consult the official standard body.