Basic FIFO setup and general information

Resolving The Problem

Some information based on the following questions....
1. I didn't find a general "Concept Document" on how FIFO works within DCS.
The Example FIFO Logic describes a good example of FIFO. We have no "FIFO Concept Document". Search on FIFO using the DCS 6.2 DCS_Help.chm document. The Example FIFO Logic topic will be listed.

2. I found several sections on FIFO setup, but no document that takes you step by step through the complete setup process.
Basically, the setup includes:
Location Setup (09253)
All locations where FIFO needs to be maintained, should have 'Inventory by Receiver' flag to be set to Y.

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Inventory Rules (09003)
Online FIFO ---> Y
When this is set to Y, FIFO will be maintained in the warehouse. FIFO will be maintained for all SKUs in the warehouse, in locations where inventory by receiver is set to Y.

FIFO gen Reqd --->Y

Dummy FIFO ---> N/A

FIFO Period ---> 15
Number of days for FIFO Period. If this value is high, it means you will be violating true FIFO, but pick and storage efficiency will be high. If this number is low, then FIFO will be more accurate, but pick and storage efficiency will be low.

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FIFO number is generated when receipt is made.

When product is received into the warehouse, the current FIFO period is computed based on the number of FIFO periods that have elapsed from start of the year (January 1) to current date. FIFO number assigned is the start date of the current FIFO period.

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Storage Rules (09013)
Mix FIFO ---> N
This indicates that, while suggesting location for putaway, products with different FIFO numbers will not be mixed in one location.

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Location Selection Rules (09304) and Location Selection Sequence Rules (09001)

When location selection rules are defined either for picking or for replenishment, order sequence should be set to consider FIFO. Then, locations in the bulk storage will be considered in the sequence of FIFO number in the inventory.
Order Seq (In Location Selection Rules) ---> 05 (FIFO)

4. In the documents, it shows the FIFO number being a Timestamp type number generated off the FIFO Period. Not sure where the ASN number comes in. Our question was does this Timestamp FIFO # get updated when an old item happens to get put back into bulk.
The FIFO number will be inserted into the Reciever Number field. This is why the Location Setup must be to have the locations track by Receiver number.