What factors affect the decomposition of starch during beer brewing? When a brewery uses beer equipment to brew craft beer, the saccharification process plays a key role, in which the decomposition of starch is the main material change in the brewhouse process. However, what factors will affect the decomposition of starch, among which are the following: degree of malt grinding, malt variety and quality, mashing temperature, mashing time. Our winemakers will share the influence of these factors.