Is your feature request the result of a bug?
No

Problem
When I want to build a part for just in time production I would like to be able to order all the parts I need in a series of POs.

Suggested solution
It would be great if one could have a simple workflow to buy all the sub-components required to complete a pending work order. In the place where parts are allocated from stock I would like to be able to append that item to a purchase request and allocate that item to the WO so it is allocated to the WO upon receipt.

Describe alternatives you've considered
Currently, I would have to upload all the parts in a BOM to a purchase order using a CSV which works but isn't very elegant. Also this can be accomplished one at a time from the WO screen when allocating but for large parts it's a pain.

Examples of other systems
Odoo does this but in a convoluted way designed for large scale production.

Do you want to develop this?
I don't have the bandwidth (I think I have the python chops to do it). Otherwise I would love to.