Explaining FIFO and LIFO lot behavior
- Last UpdatedMar 10, 2025
- 2 minute read
As lots move through an equipment item, the LotBehavior property on the equipment specifies the queuing behavior of material lots.
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First In, First Out (FIFO) - With FIFO lot behavior, the equipment processes new transaction requests from quantities in the lots with the earliest timestamps.
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Last In, First Out (LIFO) - With LIFO lot behavior, the equipment processes new transaction requests from quantities in the lots with the latest timestamps.
Examples
Example 1
Work Center 1 - This work center has a lot behavior of FIFO. When a request for a transaction arrives, the material is processed from lots with the earliest timestamp first. AVEVA™ Production Management keeps moving to the next lot in the queue until the requested quantity is satisfied. In this case 300 units are requested. AVEVA™ Production Management moves 200 units from Lot 1 and 100 units from Lot 2 to satisfy the transaction request.
Example 2
Work Center 2 - This work center has a lot behavior of LIFO. When a request for a transaction arrives, the material is processed from lots with the most recent timestamp first. AVEVA™ Production Management keeps moving to the next lot in the queue until the requested quantity is satisfied. In this case 400 units are requested. AVEVA™ Production Management moves 100 units from Lot 4, then 200 units from Lot 3, and 100 units from Lot 2 to satisfy the transaction request.
