Backflush Quality Ops

When I run backflush to fill back those quantities, I see this line in the log:

14:38:57 -----> Backflush Factor 0.1111111111111111111111111111

What is the backflush factor, why is it = 0.11?

no clue and searching for it comes up with nothing. I did find a log in KB that had it as 1, but nothing about why it would be a fraction like that.

Hoes does backflush impact earned hours? In my experimenting it doesn’t seem to add any earned hours to the LaborDtl. Is there a way to use earned hours with backflushing?
I just read this line in the help file that sounds like this might not work for me.

Neither indirect labor nor subcontract labor can be backflushed.

Also further down the help file:

Efficiencies in Backflushing
-Backflush and Quantity Only operations always have efficiencies of 100%.
-Traditional shop efficiency is determined by estimated hours, divided by actual hours, based on the production quantity. If a job operation is Quantity Only or Backflush, traditional shop efficiency does not apply.
-To determine the efficiency of such operations, compare the actual hours spent in the resource group or department to the number of hours backflushed. You need to create a report to perform this comparison. This comparison yields a reliable efficiency if the job’s operations are all of this labor type and if the entire job was processed in the resource group or department.