Example:

Suppose dough temperature is desired to be 80 degrees Fahrenheit. Then 80 times 3 will equal 240. 

Suppose also that the Shop temperature is: 80 degrees Fahrenheit Flour temperature is: 80 degrees Fahrenheit X Machine allowance is: 28 degrees Fahrenheit Therefore, temperature of water required is 240 minus 188 degrees, or 52 degrees Fahrenheit. 

X Machine allowance means that while the dough is being mixed in a high speed mixer, this dough heats up considerably, sometimes as high as 35 degrees Fahrenheit. 

For example, stiff dough will heat much faster than a medium or slack dough. Also, the type of mixer being used matters. For large amounts of dough, say 200 pounds and over, 20% more ice will be used. For smaller amounts of dough, 1-2 gallons, 10% less ice is recommended.