What conditions cause the reprocessing of Total Burdened Cost amounts?

Are there any conditions, other than the adjustment and recompilation of a Burden Schedule, that would cause a transaction to be marked for reprocessing by Distribute Total Burdened Cost?We are trying to determine why some raw cost transactions are being re-burdened for no apparent reason. We have not made any changes to the Burden Schedule, Burden Structure, Burden Cost Codes or Burden Bases.
We have not recompiled the Burden Schedule. Do you know of any conditions other than changes to the Burden Cost setups that would cause a total burdened cost transaction to be reversed and burdened again?
Thank you for any advice.