In SAP, there are basically two types of shelf-life:

1. Total Shelf Life - In case the total shelf life is maintained, then it's mandatory to enter the minimum shelf life also. During the process of Goods Receipt (GR), the user will have to enter the manufactured date of the item so that the expiry date is automatically calculated by the system.

2. Minimum Shelf Life - The date of minimum durability of the item are specified by using date markings like 'use-by' or 'best-before'. During the process of Goods Receipt (GR), the user will have to enter the date of GR so that the system can check if the material is usable according to the requirements in material master. If the minimum remaining shelf life condition is not satisfied, then the system will not accept the goods receipt.