# Policy Window

A policy window that displays the policies for a given decision node. If the node is instantiated then the policy is ignored and the policy window is disabled. Only policies with parent configurations of a non-zero probability are displayed. This is indicated by collapsing columns corresponding to parent configurations of zero probability, which happens e.g. when a parent node has evidence entered (see Figures 1 and 2).

See also Single Policy Update.

Figure 1: Example of a policy window for the node ‘Drill’ of the oil wildcatter example

Figure 2: Example of a policy window for the node ‘Drill’ with zero-probability configurations collapsed. (Parent node is in state ‘cl’)