Use Department References with orders of different weights
Currently, it is only possible to set the department reference while applying postage.
If a batch of orders is imported, and the product code and weight are defined in the CSV, it is not possible to select a department reference for the import, because postage is immediately applied.
It is possible to apply postage to a batch of orders, but all of the orders must weigh the same, and must be shipped using the same method. If you ship a lot of things with different weights and shipping methods - as most stores do - this makes it impossible to use the departments functionality without importing many, many CSVs and inputting things manually.
It would be good if Department References could be defined in the CSV, or somewhere else during import.
Dan Austin commented
I think you might be able to achieve this using a shipping rule. On the last page (of 3) when setting up your rule, there is an option for auto-selecting department.
1 thing to remember! Your csv cannot have ANY service code in it (Leave it blank), and use the shipping rule to apply the correct service for you (Page 3 again). If you include a shipping code in the csv, it will ignore any shipping rule that should be applied to it.
Hope that helps!