Is RULA appropriate for whole-body posture?

No. RULA targets the upper limb. For whole-body postures including legs and floor work, use REBA. For lift-heavy tasks, use NIOSH Lifting Index. SoterAI auto-suggests the right standard based on the captured task, but Safety Professionals can override.

Does Soter handle muscle-use and force scoring?

These two inputs require human input. After the photo or video is captured, the assessor answers a short prompt about whether the task involves repeated muscle use over a minute and whether force load exceeds 4 lb (2 kg). The grading then runs against the McAtamney and Corlett scoring grid.

Can RULA assessments be reviewed by a different ergonomist later?

Yes. Every assessment stores the source media, the posture score breakdown, the muscle-use and force inputs, the final action grade, and the assigned controls. A second ergonomist can re-open and adjust without re-capturing.

What about REBA, when do I switch?

Use REBA when the legs, feet, or trunk are loaded (lifting from floor, awkward bending, kneeling tasks). RULA's lower-limb component is a single switch; REBA scores legs in detail. SoterAI flags tasks where REBA would be a better fit.

Is the RULA action grade a regulatory requirement?

RULA itself is a method, not a regulation. Many jurisdictions reference RULA or REBA in their ergonomic risk-assessment guidance (e.g., HSE in the UK, OSHA's General Duty Clause in the US). Insurance carriers often require RULA documentation as part of loss-control programs.

Workflow · EHS

How do you run a RULA assessment in 20 minutes?

Soter's RULA workflow scores upper-limb posture against the McAtamney and Corlett scoring grid, surfaces the highest-load segments at the neck, trunk, and arms, and ranks ergonomic controls by grade. The result is a defensible assessment with the priority fixes called out, not just a number. Upload a photo or video of the workstation to see the workflow in action.

What a RULA assessment does

RULA (Rapid Upper Limb Assessment) is a posture-screening method developed by McAtamney and Corlett in 1993, designed to evaluate exposure to risk factors associated with upper-limb work-related disorders. It scores the upper arm, lower arm, wrist, neck, trunk, and legs against postural ranges, then combines posture scores with muscle-use and force scores into a final action grade.

Soter automates the photo-to-score step. The Safety Professional reviews and signs off, the same as with manual RULA. The action grade is mapped to a control set so the assessment closes with assignments, not just scores.

When RULA is the right standard

Workstations with sustained upper-limb postures (assembly, packing, light machining)
Tasks where the lower body is largely static and the upper body carries the load
Office and retail-counter ergonomic reviews where NIOSH lifting math does not apply
Pre/post-intervention measurement when redesigning a workstation

86%

UFA cut ergonomic injuries

Canadian agricultural co-op · multi-site rollout · combined RULA + REBA workflows on SoterAI

How the Soter workflow runs in about 20 minutes

Capture the task. Photo or 30-60 second video of the workstation. Worker visible from a side angle for arm scoring is ideal.
Score upper-limb posture. Automated angle extraction for upper arm, lower arm, wrist; combined with muscle-use and force inputs from a short prompt.
Get a final action grade (1-7). Grade 1-2 is acceptable, 3-4 needs further investigation, 5-6 needs investigation and changes soon, 7 needs immediate changes.
Get ranked controls per grade. Engineering controls (workstation redesign, tool changes), administrative (rotation, micro-breaks), and posture coaching for short-cycle tasks.
Assign, track, close. Owner, due date, and verification step. RULA is not closed until the action grade drops on a follow-up assessment.

Who uses this workflow

EHS leads at manufacturing plants with assembly or packing lines
Office ergonomics teams supporting return-to-office and hybrid setups
Insurance loss-control consultants assessing claimants' workstations
Construction site safety leads reviewing fixed-position rebar tying or finishing tasks

50-70%

Blackmores Group cut EHS admin

Australia, wellness manufacturer · admin reduction across ergonomic and incident workflows on SoterAI

What you get when you sign up

Full RULA action grade with the underlying posture score breakdown
Ranked engineering, administrative, and behavioral controls per grade
Side-by-side before-and-after view when re-scoring after intervention
Exportable RULA report PDF matching McAtamney and Corlett 1993 layout
Site-level dashboard of action grades by role, shift, and task type