Availability Group.....In warehouse we will have multiple storage area (Racks / Opn area /Shelf) now there is a requirement that in Rack you will store only Unrestricted stock, in Open you will store Block stock so this type of requirement can be configured using Availability group, you assign a stock type to a availability group and then that availability group is assigned to Storage type
Party entitled to dispose -- Suppose that you have a warehouse and you maintain the stock of more then one customer whom you provide service(in terms of warehouse space) now you want to know how much stock belog to customer 1 and how much is for customer 2 that type of requirement required party entitled to dispose configuration in system (e.g. DHL have a big warehouse where he provide service to P&G and Unilever from the same warehouse in that that he can configure two party entitled to dispose . There are multiple thread exist with for the same please refer that please search with the term" Party entitled for dispose"