I have gotten a student job in the management department of a chain of 50 grocery stores. The job includes gathering daily statistics on the economy of the stores.
Every day a per-store revenue statistic is made, comparing the revenue to matching day last year (sunday/sunday, monday/monday) and an accumulated statistic for the month.
Also a per-store gross margin percentage statistic is made.
Now these are simple measures and I feel that there could be a lot more to be gained from the data, the data is specific down to the (cost price)/(sale price)/(number of sales)-level on every type of item.
Furthermore no or very few graphics are made and the data from the previous years are not taken into use.
Have any of you seen a similar problem? Do you have any ideas on how to proceed? Any easy-to-read, informative types of graphs you would want to share regarding these types of data?