The basic calculation for a derated value is:
Operating systems at 100% capacity continuously is unrealistic. Implementing derating factors creates a predictable safety margin that balances performance with system longevity. Core Purpose of Derating derating factors
In simpler terms: Manufacturers say a component can handle $X$ amount of load under perfect conditions. Engineers apply derating factors to say, "In the real world, let's only let it handle $X \times \textFactor$." The basic calculation for a derated value is: