This study that is aimed at investigating the effectiveness of “in-service training” courses in public sector organizations, as a result of the findings of a process modification training course in public organizations of Kermanshah province where 68 employees of 32 organizations of public sector (including governmental and non-governmental) scientifically studied 27 processes as a sample, during the course in various teams. At the end, reductions in “process activities number”, “time needed for performing every process”, and “distance passed in each process” were considered as indicators for effectiveness of the training course and are provided in a table in the results section. In order to collect information, some forms were designed and the participants filled them over this 3-day course. The results of statistical tests showed the effectiveness of training course on the results of process modification. In addition, by performing side tests, trend of improvement in time and distance was investigated by improvement in activities number which revealed that harmony in process modification should be considered.