Hands Assessed
Choose the hand or hands performing the task. Dominant means the worker's preferred hand, rather than always the right hand.
Hand Assessment
Observe a representative work cycle. Select all six factors for each assessed hand; use the information icons for guidance.
Dominant Hand
2.1 Intensity of Exertion (Borg Scale)
2.2 Duration of Exertion (% of cycle)
2.3 Efforts per Minute
2.4 Hand/Wrist Posture
2.5 Speed of Work
2.6 Task Duration (hours per day)
Non-dominant Hand
2.1 Intensity of Exertion (Borg Scale)
2.2 Duration of Exertion (% of cycle)
2.3 Efforts per Minute
2.4 Hand/Wrist Posture
2.5 Speed of Work
2.6 Task Duration (hours per day)
Review the conclusion and each hand's selected values and multipliers. Results update as you make selections.
Assessment incomplete
Select all six factors for each assessed hand before interpreting the Strain Index. The table records your current selections.
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| Method | Original Six-factor SI | Hand(s) Assessed | Both Hands |
|---|---|---|---|
| Scope | Single Task | Custom Multipliers | No |
| Parameter | Dominant Hand | Non-dominant Hand |
|---|---|---|
| Intensity of Exertion (Borg Scale) | Not Selected | Not Selected |
| Duration of Exertion (% of cycle) | Not Selected | Not Selected |
| Efforts per Minute | Not Selected | Not Selected |
| Hand/Wrist Posture | Not Selected | Not Selected |
| Speed of Work | Not Selected | Not Selected |
| Task Duration (hours per day) | Not Selected | Not Selected |
| Strain Index (SI) | — | — |
SI is the product of six multipliers and has no units. Screening bands used here are: SI ≤3, lower; >3 to <5, uncertain; 5 to <7, elevated; and ≥7, high. These are screening categories, not a diagnosis or a guarantee of safety. Larger multipliers indicate greater contributions to the score.