Litium 7 next delivery

As far as i can se a inventory item dosent seam to have more information regarding next delivery except for next delivery date. In many B2B and some B2C cases one want to show future inventory updates with information like how many item that will be delivered and also have multiple future deliveries. Are there some extra fields on an inventory where one could store this information or are there any suggestions out there of how to handle this?

Litium version: 7.2

Apparently i have forgotten already asking this. There is a customDatafield but is not displayed anywhere i litium backoffice.