An event log is a static data source recording the business activities over a time span.
After the event log is completely recorded, conformance checking techniques are applied and the deviations, if they exist will be shown.
Hence, this kind of conformance checking provides a continuous way of monitoring a process and detecting the deviations in real-time.
Due to this difference, the conventional conformance checking algorithms are not (fully) applicable in the online context and needed to be adjusted.
Algorithm: For each received event (c, a) Log skeleton consists of constraints which describe the relationship between activities in a process.