"The aim is to identify the tasks performed by the personnel of this sector without reference to jobs, levels or training time requirements which are different in every situation or location. The identification and selection of tasks is concerned with the universal principles underlying the work practices. The list of tasks does not claim to be exhaustive. It may be that additional tasks can be developed by those responsible for training of duties performed under local conditions or for particular establishments."(Chemonics International Inc., 2006)