The process is an entirely natural one. It will take place with or without our help. Such things as bacteria, temperature fluctuations, and outside air can each effect bothe the process and the final product. The winemaking process involves the addition of yeast to a crushed fruit mixture or juice.
Yeast is a living organism which feeds on sugar.
The yeast digests the sugar in the grape juice. As mentioned before this is a natural process. Our job can be broken down into a few broad, simple steps. Here I will touch briefly on these steps. This is in no way intended to be a complete guide, rather simply an introduction to the process.