mash efficiency

Hi there, I'm very new to mash efficiency (and brewhouse efficiency as well for that matter) and I wanted to gain some insight as to how you measure this effiency, namely, do you do it before or after sparging. For example, I just did a BIAB clone recipe of Young Henry's Newtowner Pale Ale. I...

Having recently discovered maxiBIAB, it occurs to me that the potential yield of a BIAB system can be expressed in terms of: Pot size in L Grain yield potential in points per kilo per litre Mash efficiency Liquor-to-grist ratio OG required This would yield a number of litres that can be...