input data - what we need

A LIMITED SCOPE: 50 distinct products.

At least 2 years of historic if weekly, 5 years if monthly.

For the DATA we need two things:

1. Wich granularity is needed for the forecast (weekly, monthly?)

2. Data in a csv file with the following columns:

product_site_id: item id or name (unique for each product) - reference

main_category: principal category (OPTIONAL)

sub_category: sub category (OPTIONAL)

date: date of the event

demand: value of demand