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Module Info: Calculators

This page is still to be completed, for now is just collecting general info about the calculators in this module as a list.

Technical Specification

This module integrates six distinct, internationally recognized ergonomic assessment methods. Each method addresses specific risk factors associated with manual labor:

  • REBA (Rapid Entire Body Assessment): Selected for whole-body postural analysis in dynamic or rapidly changing environments (e.g., healthcare, logistics). It prioritizes sudden changes in posture and unstable loads.
  • RULA (Rapid Upper Limb Assessment): Selected specifically for sedentary, sedentary-repetitive, or workstation-bound tasks (e.g., office work, static assembly). It focuses heavily on upper extremity strain and neck/trunk positioning.
  • NIOSH Lifting Equation: Evaluates symmetric and asymmetric manual lifting and lowering tasks. It calculates recommended weight limits based on lift geometry and task frequency to prevent low-back injuries.
  • SNOOK Tables (Liberty Mutual): Selected to evaluate manual materials handling involving horizontal forces, specifically pushing, pulling, and carrying tasks, which are not covered by the NIOSH lifting equation.
  • OCRA (Occupational Repetitive Actions): Selected for high-frequency, highly repetitive cycles of the upper limbs. It tracks cumulative mechanical stress, insufficient recovery periods, and force application over complete work shifts.
  • EWAS (Ergonomic Assessment Worksheet): Evaluates cumulative postural, force, and metabolic strain across an entire work shift.

Planned System Architecture

Once implemented, each calculator in this module must expose a standardized execution interface identical to the core evaluation classes to maintain compatibility with the gui module.

For development timelines and feature tracking, please refer to the global project roadmap.