This presentation focusses on methodological challenges of analysing processes in a temporal perspective as a specific sequence of elements (path, succession). How processes can become object of educational reseach in a methodological way? First a brief overview of existing methodologies is outlined (quantitative and qualitative). Then the innovative method of sequence analysis by means of optimal-matching is explicated and located within its methodological context. Then it will be discussed, why this method is supposed to be one of the most effective ways to analyse sequences in a quantitative way (Baur 2005): results of an empirical study will be shown, highlighting the potential of this method to analyse log-data in a temporal perspective as processes.