The Engineering, where used form lists the applications of the engineering item selected on the Engineering items form. The Engineering BOM tab shows the BOM in which the engineering item is found. On the other tabs you will see the production files and production calculations to which the engineering item is linked.
Examples
Let's assume the engineer discovers a mistake and wants to replace a component. He checks the Engineering BOM tab to see in which production file the component exists, and informs the planner that a different component has to be used in the production process.
The engineer knows that a component has been used before, and checks the Engineering BOM tab to see how it was fitted, so that he knows how he can apply the component.
To see whether an engineering item can be deleted, the engineer checks any existing links to the engineering item.