How to create an assembly tutorial :
Assemblies are complex components made out of a combination of one or multiple parts . This menu will start the wizard for creating a new assembly :

Just like in the part section you are prompted to enter the assembly details and optionally link it to a client :

The Assembly screen :

Use the Add New button to add parts into the definition of the assembly :

Miscellaneous work items can be added to a assembly. Also you can generate a quote or a customer order from this screen .