Dakota Reference Manual: acceptance_logic

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acceptance_logic

Set criteria for trusted surrogate

## Specification

Alias: none

Argument(s): none

Default: filter

Child Keywords:

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

## Description

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.