At Metalworks we don't use the out of the box plant performance dashboards as they are not that useful in our case. I did ask Epicor to teach me to build my own data cubes and I now have data cubes for sales analysis by fiscal year and for our custom sales spiff data.
There is information in the ICE tools guide for these, but I did not think they were real intuitive to build. the Epicor remote training got me there in less than 4 hours though. I build a sales data for each fiscal year because the data doesn't change and there is alot of it. So instead of using sales analysis BAQ reports which hit our system hard with a year's worth of data, this allows the user to slice the data by industry, customer group, sales category, attribute, etc., etc.
I could setup the schedule to run monthly and build the current fiscal year up month by month too.