Dakota Reference Manual  Version 6.4
Large-Scale Engineering Optimization and Uncertainty Analysis
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Set criteria for trusted surrogate


Alias: none

Argument(s): none

Default: filter

Required/Optional Description of Group Dakota Keyword Dakota Keyword Description
(Choose One)
acceptance logic (Group 1) tr_ratio Surrogate-Based Local iterate acceptance logic
filter Surrogate-Based Local iterate acceptance logic


Following calculation of the merit function for the new iterate, the iterate is accepted or rejected and the trust region size is adjusted for the next surrogate_based_local iteration. Iterate acceptance is governed either by a trust region ratio (tr_ratio) formed from the merit function values or by a filter method (filter); however, trust region resizing logic is currently based only on the trust region ratio. For infeasible iterates, constraint relaxation can be used for balancing constraint satisfaction and progress made toward an optimum.