PIcking Rule Sort Criteria Priorities

Summary:

There is a large list of values to pick from when we define the priorities. I could not find documentation on the meaning of each. Some are straight forward.

What I try to achieve is to have a simple picking rule that will use the first received inventory to the warehouse picked first. I'm a bit confused with Subinventory/Locator receipt dates. Are they the dates inventory was transferred to the location, or original receipt date.

We are planning using LPNs. Does LPN receipt date is the receipt date of the LPN to inventory?

Can someone help me understand those: