WMS - drop down of available Lot Numbers when picking - as opposed to manually inputting.

We need to be able to accurately recall items if needed.  The more manual the process, such as manually inputting Lot/Batch numbers, when picking for an order,  the larger the margin of error and the less accurate a recall report will be.  Also, being able to pick from a drop down, will make the recording of the data more efficient.  Theoretically the First In/First out rule should apply - but on the off chance it doesn't - nothing is being manually input by a fulfillment team.