Propose and Revise

Abstract

The propose-and-revise strategy is suitable for deriving values for a set of parameters. It makes possible an efficient, sequential determination of the parameter values, even when the search space is locally or globally under- or over-determined or when cyclic relationships exist. Its flexibility results from the fact that the parameter values first proposed can be corrected at any time with “revision knowledge” if this turns out to be necessary. It is suitable for cyclic parameter relationships because loops can be broken by taking a cyclic parameter as a starting parameter and estimating its value. If a contradiction occurs in the subsequent calculations on account of the cyclic relations, the parameter value is raised or lowered (Fig. 23.1).