Exercise No. 1: Hierarchical Organisation Structure
Transfer the following verbal description into an ERM
a) A group (Group-ID) has several companies (Comp-ID), whereas a company belongs to one group.
b) Companies are connected by a hierarchical structure; each subsidiary is assigned to exactly one company of the next higher hierarchy level, the parent company.
c) Each company has several plants (Plant-ID); a plant belongs to one company only.
d) A plant produces many items (Item-#). An item is only produced in one of the plants.