Depending on the function, the primary purpose of the unit is defined as follows:
Tasks serve mainly to illustrate the result of the work and generally describe part or the entire expected outcome.
Operations serve primarily to illustrate the work process and describe ways of completing the work and the steps involved in the process.
Suboperations illustrate the details of the work, where it is important to do so.
Depending on the precision, the degree of precision required for each unit is defined as follows:
Tasks should designate a general action, that is, include a set of specific actions.
Operations should designate a specific action, that is, include a set of gestures considered even more precise.
Suboperations should designate a gesture; it is the smallest unit considered here.
The degree of precision of the units of work varies depending on the occupation. Every effort should be made, however, to keep it as close as possible to the targeted degree of precision (see Table 2 below).