Physical Invetory Journal Vs Warehouse Physical Invetory Journal

Actually Inventory level journals are used to adjust the quantity's inventory level
i.e. some times the physically items are not , but those are showing availability in the system.
Same thing we can do by applying item Journal when individually know when the item is sale or purchase.
But periodically company's uses to perform  these operation to adjust the differences in bulk.
This evaluation also contain two different ways:

If you are not using directed put-away and pick for a location, you perform a physical inventory using the Phys. Inventory Journal.

For more information, see How to: Perform a Physical Inventory.

 If you are using directed put-away and pick, you use the Whse. Phys. Inventory Journal, and later on, the Phys. Inventory Journal.

This process is described here. In warehouses with bins, the counting is performed and registered bin by bin.