We are a manufacturer - we need to track our employees time in Creating each Sub Assembly against the final assembled unit (I.e. Proper costing)

1. we created a sub assembly - in this case let's call it a "frame"

Under Inventory Assembly we call it a frame

in the BOM we enter the Materials we use

HSS, Angle, etc.

We also have Non-inventory items and services that we need to add and track (some are outside services, and some are our own labor - like welding and Painting, cutting etc....

The question is how to get that time into the Part (Inventory Assembly item)