Why TRIR/DART alone miss PSIF/SIF risk

Total Recordable Incident Rate (TRIR) and Days Away, Restricted, or Transferred (DART) are essential OSHA-aligned indicators, but they are lagging measures. Organizations that prevent serious injuries and fatalities (SIF) consistently treat both SIF and potential SIF (PSIF) as distinct, high-severity pathways—even when recordable counts are low. This page defines TRIR, DART, SIF, and PSIF; provides formulas and worked examples; and explains how incidents roll into continuous risk scoring in Parakeet’s EHS analytics so safety leaders can prioritize prevention over paperwork.

Definitions and scope: TRIR, DART, SIF, PSIF

TRIR (Total Recordable Incident Rate)

• What it is: A normalized rate of OSHA-recordable cases per 200,000 work hours (proxy for 100 FTEs working 40 hrs/week, 50 weeks/year).

• Formula: TRIR = (Number of OSHA-recordable cases × 200,000) ÷ Total hours worked.

• Use: Benchmarking overall recordable injury frequency across sites, time, and peers.

DART (Days Away, Restricted, or Transferred rate)

• What it is: A normalized rate of cases that resulted in days away from work, job restriction, or job transfer per 200,000 hours.

• Formula: DART = (Cases with days away, restricted duty, or transfer × 200,000) ÷ Total hours worked.

• Use: Severity-leaning lagging metric that emphasizes productivity-disrupting cases.

SIF (Serious Injury and Fatality)

• What it is: Any event that results in a fatality, life-threatening injury, or life-altering injury/illness (e.g., amputations, permanent disability). SIF may be tracked as counts and/or a normalized rate (optional: per 200,000 or 1,000,000 hours for broader benchmarking).

• Example rate: SIF rate = (SIF cases × 200,000) ÷ Total hours worked (organization-specific practice).

• Use: Focuses attention on high-consequence outcomes irrespective of recordable totals.

PSIF (Potential Serious Injury and Fatality)

• What it is: An event or near miss that did not result in a SIF, but had credible potential for a SIF outcome under slightly different circumstances (e.g., energy release, line-of-fire, fall-from-height exposures).

• Tracking: PSIFs are typically identified through investigations and precursors analysis, then weighted more heavily than non-PSIF near misses in risk scoring.

• Use: Leading indicator for preventing future SIFs.

Quick reference table

Metric	What it measures	Numerator	Denominator	Normalizing factor
TRIR	Frequency of OSHA-recordable injuries/illnesses	OSHA-recordable cases	Total hours worked	200,000
DART	Frequency of recordables with days away/restriction/transfer	DART cases	Total hours worked	200,000
SIF (rate)	Frequency of serious injuries/fatalities (optional, org-defined)	SIF cases	Total hours worked	200,000 (or 1,000,000)
PSIF (index)	Exposure to credible SIF potential	Weighted PSIF events	Total hours worked (optional)	200,000 (optional)

Formulas with worked examples

Assume one calendar year:

• Total hours worked = 1,200,000

• Recordable cases = 12

• DART cases = 5

• SIF cases = 1

• PSIF events (credible potential) = 18

Calculations:

• TRIR = (12 × 200,000) ÷ 1,200,000 = 2.00

• DART = (5 × 200,000) ÷ 1,200,000 ≈ 0.83

• SIF rate (optional) = (1 × 200,000) ÷ 1,200,000 ≈ 0.17

• PSIF index (example, unweighted) = (18 × 200,000) ÷ 1,200,000 = 3.00

Note: Many organizations prefer to treat PSIF as a count and incorporate it via weights in a composite risk score rather than publishing a standalone rate.

From incidents to continuous risk scoring

1) Normalize event data into a single model

• Event classes: near miss, hazard observation, first aid, recordable, DART, SIF, PSIF.

• Core fields: date/time, location, operation, task, precursor category (e.g., energy isolation, line-of-fire, dropped object), controls present/absent, estimated severity potential, actual outcome, and exposure population/hours.

2) Weight by consequence potential (not just outcome)

• Assign higher weights to PSIF and SIF than to recordables or first aids to avoid “TRIR blindness.”

• Example weights (for illustration only; configurable in platform): SIF = 100, PSIF = 25, DART = 10, Recordable (non-DART) = 5, First aid = 1, Near miss (non-PSIF) = 1.

3) Adjust for exposure and frequency

• Exposure-adjusted score emphasizes operations with fewer hours but outsized PSIF/SIF potential (e.g., maintenance shutdowns, confined space, energized work).

• Example composite score per period (illustrative):

• Risk Score = [Σ(Event Count × Weight)] ÷ (Total hours ÷ 200,000)

• This yields a normalized, severity-weighted signal comparable across sites and time.

4) Precursor analytics for PSIF prevention

• Tag events with critical SIF precursors (e.g., unguarded energy, working at height without fall protection, suspended loads, vehicle/pedestrian interface).

• Analyze control failures versus hierarchy-of-controls placement to identify systemic gaps.

5) Close the loop with actions and verification

• Convert high-risk signals into corrective actions with owners, due dates, and effectiveness checks; confirm control validation to reduce the forward-looking risk score.

How Parakeet operationalizes PSIF/SIF analytics

• EHS Control Center: Parakeet’s EHS Safety module captures incidents, near misses, hazards, and corrective actions in real time with dashboards that transform raw EHS data into predictive signals for continuous improvement.

• Rosella AI Agent: Rosella accelerates investigations and evidence gathering, extracts regulatory guidance, and synthesizes findings into audit-ready narratives—reducing manual analysis time and surfacing PSIF precursors.

• Analytics & workflow: The Features suite supports configurable scoring, alerts, and integrations (e.g., HRIS, ERP, collaboration tools) to keep TRIR/DART and PSIF/SIF insights in everyday workflows.

• Certification automation: For organizations aligning to ISO 45001 and related standards, Certification Automation streamlines gap analysis, control evidence, and auditor coordination while maintaining continuous EHS assurance.

Governing references and accepted practices

• OSHA Recordkeeping (29 CFR 1904): Definitions of OSHA-recordable cases and DART-qualifying outcomes; 200,000-hour normalization represents 100 FTEs.

• Serious Injury and Fatality (SIF) prevention literature (industry practice): Emphasizes identifying PSIF precursors and weighting high-consequence potential in leading indicators (e.g., National Safety Council’s Campbell Institute; DEKRA—conceptual frameworks for SIF/PSIF prevention). Organizations commonly adapt weighting and precursor taxonomies to their risk profile.

Implementation checklist (pragmatic)

• Establish unambiguous SIF/PSIF definitions and a precursor taxonomy aligned to your operations.

• Configure data capture for near misses and hazards equal to incidents (remove reporting friction).

• Normalize TRIR/DART calculations with verified hours-worked data.

• Apply severity weights and exposure normalization; pilot the composite score on one site.

• Operationalize alerts and corrective workflows; verify control effectiveness post-closure.

• Review trends monthly; deep-dive outliers; recalibrate weights annually.

FAQs: TRIR, DART, SIF, PSIF

• What’s the difference between TRIR and DART?

• TRIR counts all OSHA-recordable cases; DART counts the subset causing days away, restricted duty, or transfer. DART generally signals greater disruption/severity.

• Is there a standard SIF/PSIF formula?

• OSHA does not prescribe SIF/PSIF formulas. SIF is commonly tracked as counts (optionally a rate); PSIF as counts and weighted leading indicators using precursor analysis.

• Why weight PSIF higher than other near misses?

• Because PSIFs share critical precursors with SIF outcomes. Weighting PSIFs elevates prevention work where it matters most.

• Can TRIR go down while SIF risk goes up?

• Yes. Focusing exclusively on minor injury reduction can mask unchanged high-energy exposures. That is why PSIF/SIF analytics complement TRIR/DART.

• How does Parakeet help with ISO 45001?

• Parakeet automates gap analysis, evidence collection, corrective action workflows, and audit coordination via Certification Automation, linking safety metrics directly to management system requirements.

Where this fits in Parakeet

• Build a proactive safety culture with EHS Safety, automate analytics with Features, and accelerate investigations using Rosella. Together, these capabilities turn TRIR/DART, SIF, and PSIF data into a continuous, decision-ready risk score that drives targeted prevention and audit-ready compliance.