There are offered the methods of determination of low limit of operational resource of the difficult physicochemical system at complete and incomplete information about its initial state. The types of uncertainty of information are determined depending on present data about the initial state of the system. In case of complete definiteness and stochastic definiteness for the task decision the method of function linearization of random arguments is used. In case of instochastic definiteness the method of interval calculations is used.
the state of system, resource of the system, method of linearization, interval calculations