14 templates
Bowtie risk templates
The barrier-based risk diagram used in process safety, aviation and healthcare: threats on the left, the top event at the knot, consequences on the right, and preventive and recovery barriers on every path — each with its own effectiveness, escalation factors and degradation controls. Residual risk per path is computed from the barrier chain, so a decorative barrier is visible as one that changes no number.
Bowtie — LPG Storage Loss of Containment
COMAH-style bowtie for a 68-tonne LPG bullet: 0.43 loss-of-containment opportunities a year cut to a 0.0231/yr top event, ranking the independent high-level fill trip as the most critical barrier on site and flagging its proof-test bypass as an unmanaged escalation factor.
Risk & ReliabilityBowtie — Wrong-Dose Medication on an Acute Ward
Ward-level bowtie for injectable medicines: 60 dosing errors a year reduced to 5.04 wrong doses reaching a patient, ranking the bedside barcode scan twice as critical as the smart-pump drug library and leaving 97.9% of the inherent harm removed.
Risk & ReliabilityBowtie — Runway Incursion at a Controlled Aerodrome
Aerodrome safety bowtie covering pilot, driver and controller threats: 6.8 incursion opportunities a year cut to 0.43/yr on the runway, ranking illuminated stop bars above surface movement radar and the go-around above every other recovery barrier.
Operations & OpsBowtie — Dropped Object from a Drilling Derrick
Offshore DROPS bowtie for tools and tubulars handled 30 m above the drill floor, turning 3.65 release opportunities a year into 0.353/yr of falling objects and ranking the tool-tethering policy above every inspection regime on the rig.
Risk & ReliabilityBowtie — Ransomware Encryption of Production Systems
Cyber bowtie treating ransomware as a barrier problem rather than a tooling problem: 48 attempts a year reduced to 1.51 executions, ranking phishing-resistant MFA three times above the mail gateway and flagging an appliance missing from the asset inventory.
Operations & OpsBowtie — Listeria in Chilled Ready Meals
Food-safety bowtie for ready-to-eat product handled after the cook step, turning 14.5 contamination opportunities a year into 1.49 that get past the lethality step, ranking the physical high-care barrier above all environmental monitoring.
Scientific PlotsBowtie — Fall from Height on Steel Erection
Construction bowtie for operatives working 12 m above ground on open steel: 4.3 exposures a year reduced to 0.49 falls, ranking the PASMA-trained tower assembler above the safety netting and flagging its green handover tag as uncontrolled.
Risk & ReliabilityBowtie — Unauthorised Trading on a Proprietary Desk
Operational-risk bowtie for a proprietary trading desk: 1.85 concealment attempts a year reduced to 0.166 undetected positions, ranking the real-time hard limit block four times above any after-the-fact reconciliation and flagging the collusion path.
Business & StrategyBowtie — Embankment Dam Overtopping
Reservoir safety bowtie for 18 million cubic metres impounded above a valley town, computing a 0.00641/yr overtopping frequency from three flood threats and ranking the annual scour-valve exercise above the spillway design itself.
Scientific PlotsBowtie — Customer Data Exfiltration from Cloud Storage
Cloud data-protection bowtie over 9 million customer records: 14.5 exposure events a year reduced to 0.66 readable accesses, ranking short-lived federated credentials narrowly above the org-level public-access block and 98.7% of inherent risk removed.
Business & StrategyBowtie — Signal Passed at Danger
Barrier-based analysis of a SPAD on a suburban route, ranking the route conductor and the two TPWS installations as the most critical barriers and leaving 98.9% of the inherent risk removed.
Risk & ReliabilityBowtie — Ransomware on a Hospital Network
Flat-dialect bowtie for encryption of clinical systems at an acute trust, where credential stuffing rather than phishing drives 64% of the top event and conditional access ranks as the most critical barrier.
Risk & ReliabilityBowtie — Undeclared Allergen in a Ready Meal
Food safety bowtie for undeclared allergen reaching a retail ready meal, ranking barcode reconciliation at the packing line as the one barrier whose removal multiplies residual risk almost fourfold.
Risk & ReliabilityBowtie — unsafe or non-compliant LLM response to a customer
Barrier-based bowtie for a customer-facing LLM assistant emitting unsafe or non-compliant output, with preventive barriers against injection, jailbreak, stale retrieval and ungrounded generation and recovery barriers for regulatory breach and PII disclosure, used in an AI safety case or Consumer Duty review.
AI & Pipelines