Changes

'''(In progress)''' '''Quality Assurance''' refers to the process if developing standard operating procedures for proactively avoiding quality problems <ref name="Diffen">[https://www.diffen.com/difference/Quality_Assurance_vs_Quality_Control "Quality Assurance vs. Quality Control". Diffen website. Retrieved 03/28/2018.]</ref>. In the brewing industry, this includes avoiding off-flavors from contamination, dissolved oxygen in beer, fermentation and ingredient issues, etc.