Inventory models refer to the way in which items are managed as they move around TradePeg. They dictate what information needs to be entered when moving stock around the warehouse, or out the door!
They are applied to each SKU individually, giving you the flexibility of managing different product lines with different controls. We can set a SKU to be multi-binned, batched, make it require quality control, etc.
They are applied per SKU on the product page (or in bulk via an Import Template): 
They are created and managed from Inventory > Manage > Advanced > Inventory Models.
Multi-Bin Storage
Static: For use when you are not tracking exact stock in each bin location.
Active: Entering a bin location when moving or receiving stock is optional.
Strict: Entering a bin location is required when moving or receiving stock.
Batch Mode:
Refers to batched goods, where you are tracking expiry dates, lot numbers, etc.
Inactive: For use when you are not tracking expiry dates.
Active: Entering batch information is optional.
Strict: Entering batch information is required.
“Batch Data” sets which data is used to identify a Batch. If ‘Full Batch Info’ is used, at least one of the three core fields (Best Before Date, Production Date, Lot Number) must be entered when creating a Batch.
“Batch Fields” allow you to define optional additional information which may be necessary to help identify a batch.
“Require QC” means that received stock is reserved until it undergoes Quality Control.