solution_mode

Solution mode for multilevel/multifidelity methods

Specification

  • Alias: None

  • Arguments: None

  • Default: online pilot

Child Keywords:

Required/Optional

Description of Group

Dakota Keyword

Dakota Keyword Description

Required (Choose One)

Ensemble Sampling Solution Mode

online_pilot

Specify a solution mode that includes the pilot cost within the sample allocation logic

offline_pilot

Specify a solution mode that excludes the pilot cost from sample allocation logic

online_projection

Specify a solution mode that estimates performance based on projecting initial correlation / covariance estimates from an online pilot sample

offline_projection

Specify a solution mode that estimates performance based on projecting initial correlation/variance estimates from an offline pilot sample

Description

Multilevel / multifidelity sampling methods are adaptive UQ methods that utilize a pilot sample to estimate an initial set of correlations or variances, and then augment the pilot with additional sample increments to optimally allocate resources. The pilot sample can be integrated according to one of three solution modes:

  • online_pilot: include pilot sample cost within sample allocation (default)

  • offline_pilot: treat pilot cost as offline and exclude from sample allocation

  • pilot_projection: only perform the pilot sample and only estimate the expected performance based on a projection of the pilot statistics (useful for method selection)

Default Behavior Online pilot