Receive Time not working on configured parts


I’m having trouble setting a receive time that works for configured parts. I have set it in the configurable part (to 5 days) but this does not show in the jobs created. Should I be using a different field for this (e.g. Production Prep Buffer)?

We would like the work to start on the assemblies so that they are finished 5 days before they are due to be sent out of the factory.

Any help would be great, thanks.