Abstract
Long lasting beer foam is the goal of every commercial brewers for hundreds of year. Every brewers go to great lengths to improve head retention. Technician would try to find reasonable factors in every unit which might lower beer foam stability from the theoretical point of view once the sigma value get worse. Unfortunately, we can’t identify what factors lower the foam stability by de- sign of experiments because of insignificant statistical result. We can only claim that the factors not studied reduce the foam stability. All producing parame- ters remain the same decays of years. This factors not studied so far are ”Block Variables” in DOE. Monotonic environment couldn’t be constructed because tech- nician never control ”Block Variables”. The goal of this study is: ”Constructing A Monotonic Environment For Beer-Foam Experiments”. Control Our final goal is determining the optimal values for parameters including mashing, fermentation, filtration and packaging. Due to budget and time limita- tion, This study only foucus on packaging. The opitmal parameters of mashing, fermentation, filtration deserves further investigation.