An overall description of electronic weapon system maintenance training research which was conducted under Task FORECAST and which was directed primarily toward troubleshooting electronic systems is presented. This training research sought to determine the effectiveness of a method for analyzing electronic systems based on simple logic as opposed to the traditional method based on extensive electronic knowledge. Included in the report are previously unpublished research, assumed electronic-system characteristics, description of methods dealing with teat equipment and a contrast between training methods research and content research. Results of the several studies suggest that training based on FORECAST methods produces workers capable of effectively performing troubleshooting jobs with less training time than is required for traditional electronic maintenance training. (EM)