Sustained Posture Assessment

This assessment is scoped to a single risk factor: static or awkward posture held over time. It is not a general task review, and using it where the real exposure is lifting or repetition will miss the finding that matters.

ISO 11226 evaluates static postures against duration and joint angle rather than a load figure; defensibility rests on duration and change opportunity being recorded honestly, not estimated.

ISO 11226 is a voluntary international standard, not a legal instrument, so its practical reach depends on how each jurisdiction treats musculoskeletal disorder prevention and whether it names a specific method.

The fields that determine whether this assessment is useful are the ones that separate the posture from the opportunity to escape it.

The findings below are the ways this assessment is completed correctly on its own terms but still misses the exposure that actually causes harm.

A packing line ran a quality check station where an inspector stood bent forward over a conveyor most of a shift. The assessment recorded forty minutes continuous, no postural change possible, no sit-stand option because the check needed close inspection at conveyor height. It rated the risk high, recommended a stool and rotation to a second station, and closed with posture-awareness training.

Six months later the station generated three stiffness complaints in a quarter, all from workers rotated onto it. The rotation spread the exposure rather than reducing it, and the stool went unused because the conveyor height still forced a forward bend. Nobody had recorded why the conveyor height itself, the actual cause, had not been raised as a redesign option; the assessment scored the posture accurately and stopped one level short of the control that would have removed it.

The assessment records a posture at a point in time. What actually fails is the workstation change that never gets raised, and the rotation plan that spreads exposure instead of removing it.

KnowErgo

Holds the posture assessment against the task and job registers, flags tasks whose workstation has changed since the last assessment, and routes review to a trained assessor.

KnowTrain

Connects a training-level control decision to the competency record it depends on, so a control chosen for cost reasons still produces a tracked requirement.

KnowSafe

Links the assessment to the risk register and any CAPA raised from it, so a high-risk finding stays visible until the linked action closes.

Ella

Watches for repeated fatigue reports against the same task and raises reassessment automatically, rather than waiting for the scheduled review.

Static posture load

The muscular load of holding a position without movement, which fatigues faster than dynamic work because sustained contraction restricts blood flow to the muscle.

Postural change opportunity

A worker's ability to shift weight, sit briefly or step away during a task, treated as a mitigating factor separate from the posture itself.

Continuous hold duration

The length of time a posture is maintained without a break, distinct from total time spent in that posture across a shift.

REBA

Rapid Entire Body Assessment, a validated method scoring whole-body posture including trunk, neck, legs and load, banded from negligible to very high risk.

Reach zone

The distance from the body at which a task is performed, categorised as primary, secondary or extended, with extended reach adding shoulder and trunk loading.