Target Item Groups
Target items can be grouped together in two ways: Groups and Subgroups.
Grouped Items
A group is a good way to identify items that are similar in some respect - those quantifying tonnage, those pertaining to availability, those dealing with the crews and so on. By default, if an item is not allocated to a group it will be listed as Ungrouped.
Group and Subgroup are optional attributes that are set when you create or modify a target item: