Understand how Lot groups affect queuing

When lots have a lot group assigned to them, and this lot group is specified as having preference, AVEVA Production Management processes according to normal FIFO and LIFO rules, but disregards any lots that do not belong to the specified lot group.

Explaining FIFO and LIFO behavior for Lot Groups

The following two examples illustrate the behavior when moving lot groups in and out of work centers with either the FIFO lot-queuing behavior or the lot-queuing LIFO behavior.

Example 1: Queuing behavior with Lot Groups (FIFO)

In this example, the work center has a lot behavior of FIFO. The lots are assigned to lot groups. When a request for a transaction arrives, the transaction specifies only lots from Lot Group A. AVEVA Production Management moves material in order of earliest timestamp first, but only from lots belonging to Lot Group A. In this case 300 units are requested. AVEVA Production Management moves 200 units from Lot 1 and 100 units from Lot 4 to satisfy the transaction request.

Example 2: Queuing behavior with Lot Groups (LIFO)

In this example, the work center has a lot behavior of LIFO. The lots are assigned to lot groups. When a request for a transaction arrives, the transaction specifies only lots from Lot Group C. AVEVA Production Management moves material in order of latest timestamp first, but only from lots belonging to Lot Group C. In this case 500 units are requested. AVEVA Production Management moves 300 units from Lot 3 and 200 units from Lot 1 to satisfy the transaction request.

Related topics

• About Inventory

• When available quantity is less than requested quantity