What is the general method for parti-gyle brewing?

Parti-gyle brewing is a technique that involves taking multiple batches of wort from a single mash. The key aspect of this method is to drain the first wort before adding water for subsequent runnings. In this process, the first runnings yield a high-quality, stronger wort, typically used for a beer like a pale ale or a strong ale, while the second runnings, which are collected afterward, are generally lower in gravity and can be used to brew a different, often lighter beer, such as a mild ale or a small beer.

This process effectively maximizes the use of the grains and allows for the production of two different beers from the same mash, leveraging the residual sugars in the grain bed. The ability to carefully manage the draining of the first wort ensures that the higher sugars are utilized first, making this characteristically different from other brewing methods where all wort is collected and boiled in a single go.

The other methods presented do not align with the principles of parti-gyle brewing; they either focus on singular processes or do not emphasize the sequential aspect of wort extraction that is central to parti-gyle's design.