V-Model: Regression Strategy — Selecting, Prioritizing, and Justifying What You Re-Run

Date
2027-01-22
Location
Online
Host
Zach L

About this event

A live 30-minute expert session on Regression Strategy — Selecting, Prioritizing, and Justifying What You Re-Run (V-Model — The V-Model & Safety Lifecycle). What We'll Cover: What regression verification is and where it recurs on the right side of the V after every change and fix The selection method step by step: trace-based impact sets, risk ranking, and full-run triggers versus targeted subsets How regression policy maps to modification and re-verification clauses in IEC 61508 and ISO 26262 and the regression reports produced Common mistakes: fixed smoke suites regardless of change, and no recorded rationale for excluded tests The selection rationale, exclusion justifications, and pass/fail deltas auditors review after late modifications Related topics: regression testing · test selection · risk based prioritization · trace based selection · regression policy · re-run justification · smoke suite · regression report · change driven testing · test exclusion rationale · full regression triggers · targeted regression · pass fail delta · modification testing Critical Systems Analysis provides embedded functional safety consulting for V-Model — The V-Model & Safety Lifecycle. 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.