@katrina Yes - the timeline view shows me that the preprocessing task takes around 30 minutes to execute (with increased resources - previously it was 40 minutes). The "preprocessing task" is comprised of 3 smaller tasks (shown in image attached) - each of which is a relatively simple operation (for example, one is zero meaning time series data). I have increased the available resources and only seen around a 7 minute speedup compared to the last time I ran it.