Preliminary Hazard Analysis

Articles, guides, and products tagged "Preliminary Hazard Analysis" — a combined view of every catalogue resource on this topic.

User guide

E-scooter functional safety engineering: safety integrity as the sixth cross-cutting infrastructure axis — IEC 61508:2010 (E/E/PE safety-related systems, SIL 1-4) + ISO 26262:2018 (automotive FuSa, ASIL A-D) + ISO 13849-1:2023 (safety-related parts of machinery, PLr a-e, Cat B/1/2/3/4) + IEC 62061:2021 (SIL CL for machinery E/E/PES) + EN 17128:2020 Annex G (PLEV functional safety requirements) + IEC 60812:2018 FMEA + IEC 61025:2006 FTA + IEC 61709:2017 reliability data + MISRA C:2023 software safety subset + ISO/PAS 21448:2022 SOTIF + IEC 61511 process industry + IEC 60730-1:2024 controls + UL 991 + UL 1998 + DO-178C analogy

Engineering deep-dive into e-scooter functional safety as the sixth cross-cutting infrastructure axis — parallel to [fastener/joining](@/guide/fastener-and-bolted-joint-engineering.md), [thermal management/heat-dissipation](@/guide/thermal-management-engineering.md), [EMC/EMI/interference-mitigation](@/guide/emc-emi-engineering.md), [cybersecurity/interconnect-trust](@/guide/cybersecurity-engineering.md), and [NVH/acoustic-vibration-emission](@/guide/nvh-engineering.md). Covers: 10-row standards matrix (IEC 61508, ISO 26262, ISO 13849-1, IEC 62061, EN 17128 Annex G, IEC 60812 FMEA, IEC 61025 FTA, IEC 61709, MISRA C, ISO/PAS 21448 SOTIF); SIL/ASIL/PL/SIL CL cross-mapping; 6-row hazard-by-subsystem matrix (motor controller throttle-stuck, brake actuator loss, throttle position drift, BMS thermal runaway, display HMI critical info, lighting fail-dark); FMEA worked example for BLE throttle injection scenario; FTA worked example for wheel lock at speed; FMEDA with PFD/PFH calculation, Safe Failure Fraction, Hardware Fault Tolerance; risk reduction equation R_residual = R_unmitigated × (1 - RRF); 6-row mitigation matrix; ALARP principle; software safety V-model + MISRA C:2023 + formal methods; SOTIF (ISO/PAS 21448) as extension to IEC 61508; HIL testing + fault injection; 8-row real-incidents timeline (Lime brake recall 2019, Ninebot ES2 throttle creep 2020, Apollo Pro firmware bug, Boosted board fire, Bird scooter rear-wheel hub crack, Tier scooter motor-stuck); 8-step DIY safety check; 6-step DIY remediation; industry shift 2020→2026; 16 numbered sections.

17 min read

User guide

E-scooter risk management engineering as the 32nd engineering axis: risk-anticipation meta-axis — ISO 31000:2018 + ISO/IEC 31010:2019 + ISO Guide 73:2009 + Bowtie + ALARP + SFAIRP + LOPA + HAZOP IEC 61882 + FTA IEC 61025 + ETA IEC 62502 + FMEA IEC 60812 + ISO 14971:2019 + ERM COSO 2017 + Kaplan & Garrick 1981 triplet

Engineering deep-dive into risk-management engineering as the 32nd engineering axis and the 15th cross-cutting infrastructure axis — describes the systematic methodology for identification + analysis + evaluation + treatment + monitoring of risks layered over all the other axes: ISO 31000:2018 *Risk management — Guidelines* (8 principles + framework with 6 components + risk-management process with 7 stages), ISO Guide 73:2009 *Risk management — Vocabulary* (61 terms with risk / hazard / consequence / likelihood definitions), ISO/IEC 31010:2019 *Risk assessment techniques* with 41 assessment techniques, Kaplan & Garrick 1981 triplet definition «What scenario? How likely? What consequences?», ALARP (As Low As Reasonably Practicable) + SFAIRP (So Far As Is Reasonably Practicable) UK HSE principles + reverse burden of proof, risk appetite vs risk tolerance ISO 31000 vocabulary distinction, IEC 31010 risk matrix + heat map + risk register tools, HAZOP IEC 61882:2016 deviation/guide-word inductive process-hazard methodology, FMEA IEC 60812:2018 inductive component-level failure-mode analysis, FTA IEC 61025:2006 deductive top-down boolean-logic event-tree, ETA IEC 62502:2010 inductive consequence-tree with branching on mitigation success/failure, Bowtie methodology (CGE Risk Management Solutions formalized 1990s) — combines threats + barriers (preventive + recovery) + consequences around a central top event, LOPA (Layer of Protection Analysis) CCPS 2001 semi-quantitative methodology with IPL (Independent Protection Layer) credit, ISO 14971:2019 *Application of risk management to medical devices* (cross-industry inspiration), ERM (Enterprise Risk Management) COSO 2017 framework with 5 components + 20 principles, 3 Lines of Defense model IIA Position Paper 2013 (updated 2020), risk-based thinking ISO 9001:2015 clause 6.1 + IATF 16949 cross-link, ISO 26262 HARA + ISO 21434 TARA cybersecurity cross-link, ISO 31000:2009 → 2018 simplification (from 11 principles to 8). 31-row cross-axis matrix maps the risk-management concept to each of the 31 prior engineering axes (battery thermal runaway = LOPA with multiple IPLs; brake failure = FTA top event; tire blowout = Bowtie threats+barriers+consequences; ...); 8-step DIY owner risk-management 'tells' checklist (recall registry tracking + safety-related characteristic markings + manufacturer field-issue subscription + warranty RCA depth + accident statistics transparency).

15 min read