@ElsieD Basically, yes. They use a boiled down version of calculating your friction factor. The book goes into more detail but in the recipe link it's made pretty simple. " adjust the water temperature so that the combined temperature of the flour and the water is the base temperature for your food processor, between 130°F and 150°F. (We have found that 145°F works well for most machines.) With the machine running, pour all the water through the feed tube. Process for a total of 45 seconds."
Dave