Criteria are proposed and discussed for the choice of descriptors to be used in developing task analyses for use in vocational educational planning. In order to examine the possibilities of achieving stable ratings in some suggested job aspects (categories), a work operation (shortwood logging) is analyzed into 17 units which in turn are described in 10 aspects by means of ratings from 140 forestry teachers in the Swedish gymnasium/school. Five of the 10 aspects (work aspects) refer directly to the job while the remaining five aspects (pedagogical aspects) concern the students' possibilities of receiving natural feedback in the learning situation. A profile is presented for each aspect showing the medians for all the 17 units. The structure of these profiles is shown to be more stable for the work aspects than for the pedagogical aspects when the size of the judging group is varied. The correlations between work aspects and their corresponding pedagogical aspects are found to be negative. The author concludes with a suggestion for the use of the results for educational planning. (Author/JT)