.. _method-multilevel_sampling-convergence_tolerance_target:

""""""""""""""""""""""""""""
convergence_tolerance_target
""""""""""""""""""""""""""""



Select target for MLMC sample allocation



.. toctree::
   :hidden:
   :maxdepth: 1

   method-multilevel_sampling-convergence_tolerance_target-variance_constraint
   method-multilevel_sampling-convergence_tolerance_target-cost_constraint


**Specification**

- *Alias:* None

- *Arguments:* None

- *Default:* variance_constraint


**Child Keywords:**

+-------------------------+--------------------+-------------------------+-----------------------------------------------+
| Required/Optional       | Description of     | Dakota Keyword          | Dakota Keyword Description                    |
|                         | Group              |                         |                                               |
+=========================+====================+=========================+===============================================+
| Required (Choose One)   | Convergence        | `variance_constraint`__ | Allocate samples to target specified variance |
|                         | tolerance target   +-------------------------+-----------------------------------------------+
|                         |                    | `cost_constraint`__     | Allocate samples to target specified cost     |
+-------------------------+--------------------+-------------------------+-----------------------------------------------+

.. __: method-multilevel_sampling-convergence_tolerance_target-variance_constraint.html
__ method-multilevel_sampling-convergence_tolerance_target-cost_constraint.html



**Description**

 

Sets the target of the MLMC sample allocation, i.e. the constraint of
the MLMC sample allocation problem

**Default Behavior:** ``variance_constraint``