.. index:: Decision Node

.. _Decision_Node:

Decision Node
=============

A decision node represents a decision to be made by the user. A decision node can be added to the current network by activating the :ref:`Decision Tool<decision_tool>` and clicking somewhere in the :ref:`Network Pane<network_pane>`.
A :ref:`Bayesian network<about_bayesian_network>` extended with decision nodes and :ref:`utility nodes<utility_node>` is called a :ref:`Limited Memory Influence Diagram (LIMID)<About_Limited_Memory_Influence_Diagram>`. The decision nodes represent decisions controlled by an external user. This means that compared to :ref:`discrete chance nodes<discrete_chance_node>`, decision nodes have no conditional probability tables (CPTs). Instead an initial policy for the decision is specified. 

In the LIMID, :ref:`monitor windows<monitor_windows>` for decision nodes and :ref:`Node List Pane<node_list_pane>` show the expected utility of each decision option and the probability of choosing each option under the current strategy. 

Decision nodes cannot appear in a network together with :ref:`continuous chance nodes<continuous_chance_node>`.

Decision nodes are assigned a :ref:`type<node_type>`.
