Many proposals have been made for CAC algorithms. The entropy of a substance is a function of a small number of variables. Bulk properties of the substance can be calculated from it. Statistical fluctuations in the behaviour of the substance can be predicted from it. The Large Deviation Principle is a sophisticated version of the law of averages.
Actuaries use large deviation rate functions to calculate safe premiums.
Teletraffic engineers use large deviation rate-functions to calculate safe buffer sizes. There is a strong connection between large deviation theory and statistical physics. The entropy function of a gas is a large deviation rate function. Engineers don't calculate entropy functions from models - they measure them directly. The Mosquito algorithm is a CAC algorithm developed by the Measure consortium.