I believe this is mostly used to calculate an Expiration Date. I believe the parts must at least be lot/batch tracked for this to work.

Below I set a Shelf Life of 365 Days for my lot/batch tracked product

Now if I set a Manufacturing Date on the shop order this will be used to calculate the Expiration Date (and saved on the Part Lot Batch. If you don’t set anything I believe the date when you first receive the lot/batch from the shop order will be used.

Thanks, so it is manually filled it to calculate the expiration date.