I have a timeseries sales dataset with about 19 million observations across five years for 658 different items.
For example, the item “Eye Trio” would be a part of the following hierarchy:
COLOR COLLECTIONS COLLECTIONS-EYE
Is it possible to use any or each level of this hierarchy while only sampling a few items from each hierarchy? Could I sample the hierarchy using it’s actual mean and std to feed into the level below until it eventually gets to the item level. sales…which is what I want to model?