Functional Safety: Impact Analysis for Modifications — Re-Entering the Lifecycle Correctly

Date
2026-12-08
Location
Online
Host
Zach L
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About this event

A live 30-minute expert session on Impact Analysis for Modifications — Re-Entering the Lifecycle Correctly (FSA & Services — Assessment & Services). What We'll Cover: What modification impact analysis is and why change control is a top source of in-service incidents and audit findings Step by step: describe the change, trace affected requirements and analyses, choose the re-entry phase, re-verify and re-assess How it maps to IEC 61508-1 Clause 7.16 and ISO 26262-8 change management, producing an impact analysis record Common findings: like-for-like claimed for non-identical parts, HARA never revisited, software patches outside the process Evidence auditors look for: the impact analysis per change, re-verification results, and updated safety case baselines Related topics: modification impact analysis · change management · iec 61508 clause 7.16 · iso 26262-8 change · lifecycle re-entry · like for like replacement · re-verification scope · management of change · hara update · software patch control · baseline update · change request record · regression of safety analysis · configuration control Critical Systems Analysis provides embedded functional safety consulting for FSA & Services — Assessment & Services. Learn more: https://criticalsystemsanalysis.com Partner with us: https://meetings.hubspot.com/benjamin-twombly/strategic-partnerships

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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

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.
Risk reduction allocation
Distributing required risk reduction among mechanical design, safeguards, control functions and procedures.
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.