This report provides information on rates of progression to the five-skill level in Category B skills by comparing samples of technical school and on-the-job training personnel. Development of the methodology used to measure the rates of progression to the five-skill level was described, along with an explanation of the achievement ratio defined in this study. Achievement rates from basic military training (BMT) to graduation to award of the five-skill level were investigated. In the majority of the Category B specialities, there was inconclusive evidence of any advantage for technical training over OJT. In the specialities in which there were substantial differences between the two groups, the differences in most cases favored technical training. There were two specialities in which neither training group was superior to the other. The achievement rates after award of the three-skill level (i.e., apprentice level) to award of the five-skill level were not entirely consistent with achievement rates from BMT graduation to the five-skill level. In many cases, it was found that OJT personnel progressed more rapidly than technical school personnel from the three-skill to the five-skill level. (Author)