  Business processes are continuously evolving in order to adapt to changes due
to various factors. One type of process changes are branching frequency
changes, which are related to changes in frequencies between different options
when there is an exclusive choice. Existing methods either cannot detect such
changes or cannot provide accurate and comprehensive results. In this paper, we
propose a method which takes both event logs and process models as input and
generates a choice sequence for each exclusive choice in the process model. The
method then identifies change points based on the choice sequences. We evaluate
our method on a real-life event log. Results show that our method can identify
branching frequency changes in process models and provide comprehensive results
to users.
