Insights

Notes from the field.

Practitioner writing on functional safety — the standards, the analyses, and the tooling. No reheated standard summaries; only things learned by doing the work.

ISO/TS 5083:2025 explained: what changed for ADS safety and who needs it

A practitioner's guide to ISO/TS 5083:2025 — the new reference for automated driving system safety: what it covers, how it relates to ISO 26262 and SOTIF, and who needs to care now.

Your safety case is rotting in a spreadsheet

Safety-case evidence degrades the moment it stops being traceable. Why spreadsheet workflows fail at assessment, what evidence management actually requires, and what I built instead.

FTTI is measured, not guessed: simulating fault tolerant time intervals

Most programs set the fault tolerant time interval by convention and hope. Why FTTI deserves vehicle-dynamics simulation, and how a purpose-built tool changed the safety concept on a real program.

Where LLMs actually help in functional safety — and where they must not

A working split between AI-accelerated and human-owned safety work, from someone using LLM-assisted workflows on a real safety program: drafting, tracing, and tooling yes; judgment and evidence no.

ISO 26262 or ISO 13849? What happens when automotive meets machinery

Test equipment, off-highway autonomy, and proving-ground robots sit between two safety worlds. How to decide which standard governs, and how to build one argument that satisfies both.

10 February 2026

FMEDA without the folklore: what SPFM and LFM actually demand

Practical notes on quantitative safety analysis under ISO 26262 — where diagnostic-coverage claims come from, why the SBC matters, and the mistakes that surface at confirmation review.