Features / Ergonomics
Three industry-standard MSD methodologies. One in-app workflow. One audit-defensible record.
Most ergonomics evaluations live in a spreadsheet — printed REBA / RULA / NIOSH worksheets filled out by hand, scored mentally, then transcribed into a separate tracking system that doesn't remember which method was used or what the recommended interventions were. SE ships an interactive worksheet for each of the three core MSD methodologies, with live scoring, geometry reference diagrams next to the inputs that need them, and a one-click Apply that writes methodology + score + interpretation back to a structured assessment record. The assessment carries who did it, who or what it's about, body regions implicated, recommended interventions, and an optional follow-up date — all on the same audit trail as the rest of the platform.
An ergonomist walks through a REBA scoring of a press-line task against Apex Manufacturing demo data — picks the postures, watches the live Grand REBA + action level update, clicks Apply, downloads the audit-binder PDF. On-screen captions narrate each step.
See it in action
The composite lifting calculator, up close.
A short, captioned clip of the running product against the Apex Manufacturing demo tenant. Click to play.
What's in it
The capability surface.
Structured assessment record
- Each assessment captures: the assessor, the worker (or workstation if the task — not the worker — is the focus), a free-text task description, the chosen methodology (REBA / RULA / NIOSH / Other), the resulting score, a free-text interpretation, the body regions implicated, recommended interventions, optional follow-up date, and free-text notes.
- Site-scoped — ergonomics is observation-style work tied to a specific worksite, not a tenant-wide catalogue.
- Single permission gate — Safety Officer + Tenant Admin tier; same level as observations.
- Create, view, edit, and delete on the same audit trail every record on the platform writes to — who changed what, when.
REBA worksheet (Rapid Entire Body Assessment)
- Nine radio-group questions covering trunk, neck, legs, load / force, upper arm, lower arm, wrist, coupling, and activity adjustments — the published Hignett & McAtamney 2000 inputs.
- Live scoring as the user picks postures — Posture A, Score A, Posture B, Score B, Score C, Grand REBA (1–15), and action level (Negligible / Low / Medium / High / Very High) all visible without a Save click.
- Three hard-coded REBA lookup tables baked into the algorithm; identical results to the paper worksheet — verified against published reference scenarios.
- Apply writes methodology = REBA, the Grand score, and an interpretation line back to the assessment record in one click.
RULA worksheet (Rapid Upper Limb Assessment)
- Sibling to REBA, scoped to upper-body / repetitive-task analysis — the McAtamney & Corlett 1993 method most office and assembly-line evaluations use.
- Nine radio-group questions: upper arm, lower arm, wrist, wrist twist, neck, trunk, legs, muscle use, force / load.
- Live Grand RULA score (1–7) + action level (Acceptable / Investigate Further / Investigate and Change Soon / Investigate and Change Immediately) — distinct from REBA's 5-level scale; the two methods aren't interchangeable.
- Apply writes methodology = RULA back to the assessment.
NIOSH lifting calculator (single task)
- The 1991 revised NIOSH lifting equation: RWL = LC × HM × VM × DM × AM × FM × CM, plus Lifting Index (LI = Load / RWL).
- Continuous numeric inputs (kg, cm, degrees, lifts/min) rather than radio groups — manual lifting is geometry-driven, not posture-rated.
- Live result panel shows every multiplier (HM / VM / DM / AM / FM / CM) plus RWL plus LI plus risk level (Low / Moderate / High at the published 1.0 / 3.0 thresholds).
- Out-of-envelope handling — when a multiplier zeros (H > 63 cm, V > 175 cm, F > 15 lifts/min, etc.), the result reads "∞ — out of NIOSH envelope" rather than failing silently.
NIOSH composite calculator (multi-task rotation)
- For workers who rotate between several distinct lift tasks per shift — the single-task equation underestimates risk for these scenarios because it considers only one task in isolation.
- Variable-length task list with Add task / Remove task buttons. Each task gets its own geometry inputs + coupling rating; total shift duration applies across all of them.
- Composite Lifting Index per the 1994 Application Manual chapter 5: each task's frequency-independent LI feeds into a sorted-by-stress summation that accounts for cumulative loading across the rotation.
- Per-task breakdown surfaces FIRWL + FILI + STLI + the calculator's stress-descending rank for each task, alongside the composite CLI for the rotation.
Geometry reference diagrams
- The NIOSH measurements (horizontal distance H, vertical distance V, travel distance D, asymmetry angle A) are notoriously hard to picture from text alone — "horizontal distance from mid-point between ankles to mid-point of hands" is precise but not visual.
- Each input carries a small stick-figure-worker reference figure showing exactly where the measurement is taken from.
- Reduces "ergonomist needs to keep the NIOSH reference card on the desk" to "the reference is built into the form."
- Shared across both the single-task and composite calculator — same inputs, same diagrams.
Audit-binder PDF report
- One-click download of any assessment as a self-contained PDF — the portable artefact auditors and inspectors ask for.
- Sections: assessor + subject + site + assessed-at timestamp; methodology + score + interpretation; body regions implicated; numbered recommended interventions; follow-up date; free-text notes; a content fingerprint.
- Content fingerprint is a deterministic SHA-256 hash over the assessment's logical contents — re-generating the same assessment produces an identical hash, so a future auditor can verify "this is the report we issued" without re-running the calculation.
- Same non-repudiation pattern as the disciplinary-letter and RCA-report PDFs on the platform.
In-form refresh after worksheet Apply
- Clicking Apply on any worksheet doesn't kick the user off to a reload-the-page flow — the parent assessment form rebinds in place to show the new methodology / score / interpretation values.
- The worksheet's own success message stays visible alongside the refreshed form — the user can verify "I just wrote REBA 7 to this record" without losing their place.
- Same in-place refresh applies to any future surface that writes back to an assessment — no per-feature "reload the page to see your changes" seams.
Representative workflows
What this looks like in practice.
Press-line operator — REBA assessment with a back-trouble follow-up
The Site Safety Officer is asked to evaluate a press operator who's been reporting recurring lower-back strain. She opens a new ergonomics assessment, picks the operator as the subject, writes the task description ("Loading 12 kg dies into the press table from a parts cart 50 cm away"), and opens the REBA worksheet that mounts inside the same edit page. As she watches the operator work, she rates each posture — trunk flexed 20–60°, neck 0–20°, legs bilaterally supported but knees 30–60° flexed, load 5–10 kg, upper arm flexed 46–90°, lower arm in mid-range, wrist deviated, coupling fair, no special activity adjustments. The Grand REBA reads 7 — Medium risk. She clicks Apply; the form rebinds in place to show methodology REBA, score 7, and an interpretation line reading "REBA 7 — Medium — further investigation, change soon." She fills in body regions (Back, Wrist), three recommended interventions (raise the parts cart to mid-thigh height, retrain on lifting technique, add a turntable so the operator doesn't twist), and a follow-up date 30 days out. Downloads the PDF for the audit binder. The whole sequence is one record, one audit trail, one report — not a printed worksheet plus a tracking spreadsheet plus a Word document.
Warehouse picker — NIOSH composite analysis for a 6-task rotation
A warehouse picker rotates between six pick stations over an 8-hour shift — different shelf heights, different reach distances, different load weights, different lift frequencies. The single-task NIOSH equation is the wrong tool here; it can only describe one task at a time and would systematically understate the cumulative risk. The ergonomist opens the composite calculator, sets shift duration to 2–8 hours, then adds six tasks with their geometry and frequency. Each task gets its own per-task FIRWL and STLI surface so she can see which station is doing the most damage; the composite CLI sums them via the published 1994 Application Manual formula. CLI reads 2.8 — Moderate, with task 4 (high shelf, awkward reach) the clear outlier. The recommended interventions write themselves: lower task 4's pick height, redistribute the rotation to reduce its frequency. Apply writes back; the assessment is the audit record. The "I need to do six separate evaluations and add them up in my head" workflow is not how the equation was published.
VDU office worker — RULA assessment, upper-body focus
An office worker reports neck and wrist discomfort from a standing desk that doesn't quite line up. RULA is the right tool — upper-body / repetitive-task focus, neck and wrist front-and-centre. The Safety Officer opens the RULA worksheet, rates each posture (upper arm 21–45° flex, lower arm out of mid-range, wrist deviated, wrist twist mid-range, neck >20° flex, trunk upright, legs balanced, muscle use static, force load < 2 kg), watches Grand RULA hit 5 — Investigate Further + change soon. Apply writes methodology = RULA back; she fills body regions (Neck, Wrist), recommended interventions (raise monitor 8 cm, add wrist rest, schedule micro-breaks), follow-up date 14 days. Same flow as REBA, different scale, different action thresholds — the platform doesn't muddle them.
How this is different
What sets the ergonomics surface apart.
Ergonomics is one of the most paper-bound corners of EHS — methodology worksheets are typically photocopied reference cards, filled in with a pen, scored in someone's head, then re-typed into a tracking spreadsheet that doesn't carry the methodology, the inputs, or the recommended interventions. SE ships the worksheets inside the same record-keeping surface as the rest of the platform, with the three industry-standard methods all at hand and the audit artefacts auto-generated.
Three methods in one workflow — pick the right tool for the job
REBA is built for whole-body posture analysis. RULA is built for upper-body / repetitive-task analysis. NIOSH is built for manual lifting. Each method has its own published scale, its own action thresholds, and its own non-interchangeable interpretation. Most platforms ship one of them as a checkbox feature; SE ships all three with interactive worksheets, plus the NIOSH composite extension for multi-task rotations. The ergonomist picks the tool the task warrants, not the tool the platform happens to support.
Live scoring removes the transcription error class
The classic ergonomics error is a paper worksheet filled out correctly but transcribed wrong — the lookup-table cell at the intersection of trunk 3 / neck 2 / legs 2 is misread, the action level is calculated from the wrong row, the wrong score gets written into the tracking system. SE's lookup tables are the same published tables — but the platform does the lookups, not the human. The ergonomist rates each posture and the score updates live; there's no place for a transcription error to enter because there's no transcription step.
Geometry reference is in the form, not on the desk
NIOSH's horizontal distance H, vertical distance V, travel distance D, and asymmetry angle A all carry precise definitions — "from the mid-point between the ankles to the mid-point of the hands" for H, etc. The definitions are exact but hard to picture from text alone, which is why every NIOSH evaluation traditionally keeps a printed reference card on the desk. SE puts a small stick-figure-worker reference figure next to each of those four inputs. The reference is built into the form; the ergonomist doesn't have to context-switch to a paper card to remember what "horizontal distance" means in NIOSH terms.
Composite lifting analysis is a published method, not an estimate
Workers in warehousing, distribution, and assembly almost always rotate between multiple lift tasks per shift. The single-task NIOSH equation describes one task at a time; applying it task-by-task and adding the indices does not produce a valid composite. The 1994 NIOSH Application Manual chapter 5 publishes a specific Composite Lifting Index formula — sort tasks by descending single-task LI, then accumulate frequency-independent indices weighted by the cumulative-frequency multiplier differential. SE ships that formula, not an ad-hoc workaround.
The audit artefact is fingerprinted
The downloadable assessment PDF carries a cryptographic content fingerprint at the bottom — a unique identifier computed over the assessment's contents. Re-generating the same assessment produces an identical fingerprint; any data change produces a different one. Two years later, if an inspector asks "is this the same report you handed us in 2026?", the answer is a fingerprint comparison rather than a forensic re-render of historical layout. Same tamper-evident pattern as the disciplinary-letter and RCA-report PDFs.
Adjacencies
What ergonomics connects to.
Hazards
An ergonomics assessment often surfaces a workstation-level hazard (awkward reach, repetitive motion, manual lift exposure). The hazard register and treatment-plan surface is where those broader-scope mitigations land — the assessment is the diagnostic; the hazard is the ongoing record.
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Incidents
An MSD-related injury report is an incident; the ergonomics assessment that follows is the structured analysis. Both records carry the worker / site / timestamps in the same audit trail. Cross-linking the two records directly is on the roadmap.
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Behavioural safety
Ergonomics evaluations sit next to behavioural observations in the same Safety Officer's daily workflow — one rates a worker's posture mathematically, the other rates a worker's safe behaviours qualitatively. Both feed the broader workplace-management surface.
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Auditing
Every assessment create / edit / PDF-generated event produces an audit log entry alongside the rest of the platform's audit trail. Query + retain + export per tenant policy.
Site scope + role separation
Ergonomics assessments are scoped to a site. The ergonomics permission gates the surface; Safety Officer + Tenant Admin tiers carry it by default in the seeded role catalogue. Cross-site reads enforce site membership the same way every other site-scoped record does.
Multi-language
The worksheet UI ships in English (US + UK) and Dutch. Methodology acronyms (REBA / RULA / NIOSH / RWL / LI / CLI) stay English-anchored — Dutch ergonomics literature uses the English terms — but the question prompts, action-level text, and result labels are fully translated.
On the roadmap
What's next for ergonomics.
Everything above is shipped and ready to demo. These are the focused next additions for this area, sequenced by customer demand.
Continue exploring
More on the SE platform.
Five live feature spokes + two roadmap pages + the Workers' Comp claims roadmap. Jump anywhere.
See the three-method ergonomics workflow in the running product.
A 30-minute walk-through against your actual task shape — your industry, your worker rotations, your existing ergonomics tooling. We'll show the REBA + RULA + NIOSH workflows side-by-side, the geometry reference diagrams, the composite multi-task analysis, and the fingerprinted audit-binder PDF.