Human Activity Analysis

This page describes how to customize the specifications for the RULA (Rapid Upper Limb Assessment) Analysis.

You can customize a total of nine parameters, thus influencing the result of the RULA analysis via the Tools >Options menu. These parameters define the threshold values for different degrees of freedom.

The default values for these parameters are shown in the image, below.

These nine parameters are used to transform the questions involved in the RULA process to angle comparisons. For example, during the calculation of the RULA result the question might be, Is the neck bending to the side? The question is subjective unless a threshold is set. For this particular case, the software compares the value of DOF 2 of the subject manikin's neck with the threshold defined in the RULA settings. If the value of that DOF is greater than 18.375 degrees, then RULA considers the neck to be bending.

If the user determines that 18.375 degrees (default threshold) is not an appropriate value for the neck, this value may be overridden. The new value entered by the user will then be used for the next RULA calculation, and the output will be affected accordingly.