The scales for these can be found in the "key stats" section of the dashboard.
The REBA score, ranging from 1 to 15, indicates the MSD risk level. Here are the associated risk levels: 1 for Acceptable, 2-3 for Low, 4-7 for Medium, 8-10 for High, 11-15 for Very High. The REBA provides a single final score based on the posture evaluated, force requirements, type of movement, frequency of movement, and coupling observed within the task.
The RULA score, which ranges from 1 to 7, is a representation of the MSD risk. Here are the corresponding risk levels for the RULA score: 1-2 for Acceptable, 3-4 for Low, 5-6 for Medium, and 7 for High. It provides a consolidated score based on the assessment of posture, force requirements, type of movement, frequency of movement, and other relevant factors within the task.
For the NIOSH Lifting Equation, the score varies based on the task. However, generally speaking, a lifting index (LI) less than 1.0 is considered safe (Acceptable), between 1.01 and 1.50 is considered low risk (Low), between 1.51 to 2 is considered risky (Medium), between 2.01 and 3 is considered higher risk (High) and 3.01 or greater is deemed highly risky (High). This score encompasses the evaluation of various aspects, including posture, force requirements, type of movement, frequency of movement, and coupling within the task. It provides a comprehensive risk assessment for musculoskeletal disorders (MSD).
The Revised Hand Strain Index (RHSI) provides a score ranging from 0 to 10, indicating hand strain risk. It ranges from 1 to 10 being “probably safe” and >10 being “probably hazardous”. This score is derived from an assessment of posture, force requirements, type of movement, frequency of movement, and other relevant factors involved in the task, offering a consolidated measure of ergonomic risk for hand-related activities.
You can also generate worksheets to view what the scoring breakdown is for each evaluation type:
Here is an example of REBA worksheet:
