BSFS Counter Sampling

Hi, Anyone know about BSFS counter sampling? I'm in the dark on this? how is the procedures like? 

What does BSFS stand for?

Dear Jdpaul, 

To be honest, i have no idea about BSFS and i have googling on this but couldn't find it , and  this is the audit finding by my customer.  Counter sampling is something like whenever we send out product for lab testing, same batch of product need to keep some at our premise. The keep-sample is for retest purposes if the test result found exceeded the limit.