Every time a subtask is created, the software assigns (by default) a position called “neutral position”, which may be associated with a rest position in this subtask.

In practice, the basic positions adopted by the worker to perform each subtask are considered, and the percentage of time that each of them takes within the subtask is calculated. The percentages of all the positions of the same subtask must equal 100% of the time of such subtask.

As the percentages added together generally equal less than 100% (because only the main postures are considered), the remaining difference to 100% can be assigned to a “neutral position” which will include the set of positions of the subtask that we have not considered of interest for the assessment.