Yes, it is a FIFO basis. Given the same priority, earlier items that were added to the queue are retrieved before later ones.
I have found that there is no guarantee to the order time if you add an entire collection into a queue at once though, for example:
Collection Data
1 abc xyz
2 def rst
If you add the entire collection or both items in a single "Add to Queue" Action, item 1 may be added after item 2. Or Item 2 could be after Item 1.
If you want to force Item 1 to be added before Item 2, you should loop over the collection and add each individual row to the queue using "Add to Queue".
------------------------------
James Man
Professional Services
Blue Prism
Asia/Hong_Kong
------------------------------