Calculate performance considering working hours

[gertjanssenswillen]

@gertjanssenswillen thanks for the information on get_flows. I notice that the performance metrics is calculating based on calendar days, meaning it simply calculate the timestamp differences to calculate the performance metrics.

Are there some examples of how can I write the FUN function so that the performance metrics are calculated based on business hours in a day (8 hours) instead of the default 24 hours window?

Originally posted by @lejarx in https://github.com/bupaverse/bupaR/issues/24#issuecomment-732112144