Leadtime of a scheduled subcontracted service

Hello

When scheduling my production orders thru Operations scheduling, I am looking to get the purchase Leadtime from my subcontracted Item to be included in the scheduling routine in order to get an accurate scheduled end date to my production orders. Many of my end Items have subcontracting in the middle of the Route after going thru internal resources. I can’t get the scheduling routine to look at the leadtime for the subcontract service item at step 50 for instance therefore the scheduled end date is incorrect.

Any advice?

Thank you, Michel