Parts are often combined in design programs into Groups . For example, a Table is a group that consists of 5 parts.
The number of groups can be more than 1. If the number of parts = 1 piece, but there are 5 groups, 5 parts will be cut.
The part may or may not be included in the group.
When you go to the Groups editing page, you can edit the name of the Group and change the number of groups. You can add new groups.