It takes considerable time to make a temperature change due to the allowable rate of change, less than 3 to 5 degF/Minute Try to minimize the number of TCU temperature changesPick a temperature that is good for a family of stocks and use that same temperature on all specifications of that family Standardizing on temperatures may reduce mixer delays due to zone temperatures not being close to spec Picking a standard temperature will reduce the mix variations caused by variations in zone temperature during the first few batches