10.6.2 Display in multiple-posture analysis

In multiple-posture analysis, the display can show either the active instantaneous indicator or cumulative exertion load.

The instantaneous indicator is calculated for the posture corresponding to the current position of the animation cursor. Depending on the assessment procedure and selected settings, it may correspond to % Recommended Joint Capacity, % Maximum Recommended Exertion, % Maximum Isometric Capacity Used, or % Unprotected Population. As the sequence is played through, the colors show how instantaneous biomechanical demand varies from one posture to another.

Cumulative exertion load represents the state of exposure reached up to the displayed time. Its colors therefore depend not only on the visible posture, but also on previous exertions, their duration and repetition, partial recovery, and, where applicable, previous repetitions of the analyzed cycle.

To assign a color to a joint in the cumulative-load display, Ergoniza Intelligent uses the greatest value among its associated biomechanical channels. The color therefore locates the most unfavorable channel for each joint without adding exposures corresponding to different movements or muscle groups.

When visualization is activated in multiple-posture mode and cumulative-load calculation is enabled, the program asks the user to choose which of the two quantities to represent: the active instantaneous indicator or cumulative exertion load. If cumulative-load calculation is not enabled, the instantaneous indicator is displayed directly.

Figure 49 shows an example of this color coding. The image quickly identifies the most prominent joints, but the colors alone do not indicate which biomechanical channel or functional muscle group produced the result. The corresponding tables and charts must be consulted for that interpretation.

The final assessment should not be based exclusively on the representation on the model. The numerical values, active quantity, time within the sequence, duration and repetition of exertions, partial recovery, and actual operating conditions of the activity should be considered together.